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<Type Name="TreeNodeCollection" FullName="System.Windows.Forms.TreeNodeCollection">
<TypeSignature Language="C#" Value="public class TreeNodeCollection : System.Collections.IList" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit TreeNodeCollection extends System.Object implements class System.Collections.ICollection, class System.Collections.IEnumerable, class System.Collections.IList" />
<TypeSignature Language="DocId" Value="T:System.Windows.Forms.TreeNodeCollection" />
<TypeSignature Language="VB.NET" Value="Public Class TreeNodeCollection
Implements IList" />
<TypeSignature Language="C++ CLI" Value="public ref class TreeNodeCollection : System::Collections::IList" />
<TypeSignature Language="F#" Value="type TreeNodeCollection = class
 interface IList
 interface ICollection
 interface IEnumerable" />
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Base>
<BaseTypeName>System.Object</BaseTypeName>
</Base>
<Interfaces>
<Interface>
<InterfaceName>System.Collections.ICollection</InterfaceName>
</Interface>
<Interface>
<InterfaceName>System.Collections.IEnumerable</InterfaceName>
</Interface>
<Interface>
<InterfaceName>System.Collections.IList</InterfaceName>
</Interface>
</Interfaces>
<Attributes>
<Attribute FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8">
<AttributeName Language="C#">[System.ComponentModel.Editor("System.Windows.Forms.Design.TreeNodeCollectionEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(System.Drawing.Design.UITypeEditor))]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.Editor("System.Windows.Forms.Design.TreeNodeCollectionEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(System.Drawing.Design.UITypeEditor))>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="netframework-1.1">
<AttributeName Language="C#">[System.ComponentModel.Editor("System.Windows.Forms.Design.TreeNodeCollectionEditor, System.Design, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(System.Drawing.Design.UITypeEditor))]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.Editor("System.Windows.Forms.Design.TreeNodeCollectionEditor, System.Design, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(System.Drawing.Design.UITypeEditor))>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="netframework-2.0;netframework-3.0;netframework-3.5">
<AttributeName Language="C#">[System.ComponentModel.Editor("System.Windows.Forms.Design.TreeNodeCollectionEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(System.Drawing.Design.UITypeEditor))]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.Editor("System.Windows.Forms.Design.TreeNodeCollectionEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(System.Drawing.Design.UITypeEditor))>]</AttributeName>
</Attribute>
</Attributes>
<Docs>
<summary>Represents a collection of <see cref="T:System.Windows.Forms.TreeNode" /> objects.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Windows.Forms.TreeNodeCollection.Add%2A>, <xref:System.Windows.Forms.TreeNodeCollection.Remove%2A>, and <xref:System.Windows.Forms.TreeNodeCollection.RemoveAt%2A> methods enable you to add and remove individual tree nodes from the collection.
> [!NOTE]
> Enumerating the collection and removing nodes is not supported.
You can also use the <xref:System.Windows.Forms.TreeNodeCollection.AddRange%2A> or <xref:System.Windows.Forms.TreeNodeCollection.Clear%2A> methods to add or remove all the tree nodes from the collection.
Classes cannot inherit from the <xref:System.Windows.Forms.TreeNodeCollection> class.
## Examples
The following code example displays customer information in a <xref:System.Windows.Forms.TreeView> control. The root tree nodes display customer names, and the child tree nodes display the order numbers assigned to each customer. In this example, 1,000 customers are displayed with 15 orders each. The repainting of the <xref:System.Windows.Forms.TreeView> is suppressed by using the <xref:System.Windows.Forms.TreeView.BeginUpdate%2A> and <xref:System.Windows.Forms.TreeView.EndUpdate%2A> methods, and a wait <xref:System.Windows.Forms.Cursor> is displayed while the <xref:System.Windows.Forms.TreeView> creates and paints the <xref:System.Windows.Forms.TreeNode> objects. This example requires that you have a `Customer` object that can hold a collection of `Order` objects. It also requires that you have created an instance of a <xref:System.Windows.Forms.TreeView> control on a <xref:System.Windows.Forms.Form>.
[!code-cpp[TreeView#1](~/samples/snippets/cpp/VS_Snippets_Winforms/TreeView/CPP/treeview.cpp#1)]
[!code-csharp[TreeView#1](~/samples/snippets/csharp/VS_Snippets_Winforms/TreeView/CS/treeview.cs#1)]
[!code-vb[TreeView#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/TreeView/VB/treeview.vb#1)]
]]></format>
</remarks>
<altmember cref="T:System.Windows.Forms.TreeView" />
<altmember cref="T:System.Windows.Forms.TreeNode" />
</Docs>
<Members>
<MemberGroup MemberName="Add">
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Docs>
<summary>Adds a new tree node to the collection.</summary>
</Docs>
</MemberGroup>
<Member MemberName="Add">
<MemberSignature Language="C#" Value="public virtual System.Windows.Forms.TreeNode Add (string text);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance class System.Windows.Forms.TreeNode Add(string text) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Add(System.String)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Function Add (text As String) As TreeNode" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual System::Windows::Forms::TreeNode ^ Add(System::String ^ text);" />
<MemberSignature Language="F#" Value="abstract member Add : string -> System.Windows.Forms.TreeNode
override this.Add : string -> System.Windows.Forms.TreeNode" Usage="treeNodeCollection.Add text" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Windows.Forms.TreeNode</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="text" Type="System.String" />
</Parameters>
<Docs>
<param name="text">The label text displayed by the <see cref="T:System.Windows.Forms.TreeNode" />.</param>
<summary>Adds a new tree node with the specified label text to the end of the current tree node collection.</summary>
<returns>A <see cref="T:System.Windows.Forms.TreeNode" /> that represents the tree node being added to the collection.</returns>
<remarks>
<format type="text/markdown"><]
[!code-csharp[TreeView#1](~/samples/snippets/csharp/VS_Snippets_Winforms/TreeView/CS/treeview.cs#1)]
[!code-vb[TreeView#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/TreeView/VB/treeview.vb#1)]
]]></format>
</remarks>
<altmember cref="M:System.Windows.Forms.TreeNodeCollection.Remove(System.Windows.Forms.TreeNode)" />
<altmember cref="M:System.Windows.Forms.TreeNodeCollection.RemoveAt(System.Int32)" />
</Docs>
</Member>
<Member MemberName="Add">
<MemberSignature Language="C#" Value="public virtual int Add (System.Windows.Forms.TreeNode node);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance int32 Add(class System.Windows.Forms.TreeNode node) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Add(System.Windows.Forms.TreeNode)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Function Add (node As TreeNode) As Integer" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual int Add(System::Windows::Forms::TreeNode ^ node);" />
<MemberSignature Language="F#" Value="abstract member Add : System.Windows.Forms.TreeNode -> int
override this.Add : System.Windows.Forms.TreeNode -> int" Usage="treeNodeCollection.Add node" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="node" Type="System.Windows.Forms.TreeNode" />
</Parameters>
<Docs>
<param name="node">The <see cref="T:System.Windows.Forms.TreeNode" /> to add to the collection.</param>
<summary>Adds a previously created tree node to the end of the tree node collection.</summary>
<returns>The zero-based index value of the <see cref="T:System.Windows.Forms.TreeNode" /> added to the tree node collection.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
This version of the <xref:System.Windows.Forms.TreeNodeCollection.Add%2A> method allows you to add previously created <xref:System.Windows.Forms.TreeNode> objects to the end of the tree node collection.
You can also add new <xref:System.Windows.Forms.TreeNode> objects to the collection by using the <xref:System.Windows.Forms.TreeNodeCollection.AddRange%2A> or <xref:System.Windows.Forms.TreeNodeCollection.Insert%2A> methods.
To remove a <xref:System.Windows.Forms.TreeNode> that you previously added, use the <xref:System.Windows.Forms.TreeNodeCollection.Remove%2A>, <xref:System.Windows.Forms.TreeNodeCollection.RemoveAt%2A>, or <xref:System.Windows.Forms.TreeNodeCollection.Clear%2A> methods.
> [!NOTE]
> A <xref:System.Windows.Forms.TreeNode> can be assigned to only one <xref:System.Windows.Forms.TreeView> control at a time. To add the tree node to a new tree view control, you must remove it from the other tree view first or clone it.
## Examples
The following code example displays customer information in a <xref:System.Windows.Forms.TreeView> control. The root tree nodes display customer names, and the child tree nodes display the order numbers assigned to each customer. In this example, 1,000 customers are displayed with 15 orders each. The repainting of the <xref:System.Windows.Forms.TreeView> is suppressed by using the <xref:System.Windows.Forms.TreeView.BeginUpdate%2A> and <xref:System.Windows.Forms.TreeView.EndUpdate%2A> methods, and a wait <xref:System.Windows.Forms.Cursor> is displayed while the <xref:System.Windows.Forms.TreeView> creates and paints the <xref:System.Windows.Forms.TreeNode> objects. This example requires that you have a `Customer` object that can hold a collection of `Order` objects. It also requires that you have created an instance of a <xref:System.Windows.Forms.TreeView> control on a <xref:System.Windows.Forms.Form>.
[!code-cpp[TreeView#1](~/samples/snippets/cpp/VS_Snippets_Winforms/TreeView/CPP/treeview.cpp#1)]
[!code-csharp[TreeView#1](~/samples/snippets/csharp/VS_Snippets_Winforms/TreeView/CS/treeview.cs#1)]
[!code-vb[TreeView#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/TreeView/VB/treeview.vb#1)]
]]></format>
</remarks>
<exception cref="T:System.ArgumentException">The <paramref name="node" /> is currently assigned to another <see cref="T:System.Windows.Forms.TreeView" />.</exception>
<altmember cref="M:System.Windows.Forms.TreeNodeCollection.Remove(System.Windows.Forms.TreeNode)" />
<altmember cref="M:System.Windows.Forms.TreeNodeCollection.RemoveAt(System.Int32)" />
</Docs>
</Member>
<Member MemberName="Add">
<MemberSignature Language="C#" Value="public virtual System.Windows.Forms.TreeNode Add (string key, string text);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance class System.Windows.Forms.TreeNode Add(string key, string text) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Add(System.String,System.String)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Function Add (key As String, text As String) As TreeNode" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual System::Windows::Forms::TreeNode ^ Add(System::String ^ key, System::String ^ text);" />
<MemberSignature Language="F#" Value="abstract member Add : string * string -> System.Windows.Forms.TreeNode
override this.Add : string * string -> System.Windows.Forms.TreeNode" Usage="treeNodeCollection.Add (key, text)" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Windows.Forms.TreeNode</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="key" Type="System.String" Index="0" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="text" Type="System.String" Index="1" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
</Parameters>
<Docs>
<param name="key">The name of the tree node.</param>
<param name="text">The text to display in the tree node.</param>
<summary>Creates a new tree node with the specified key and text, and adds it to the collection.</summary>
<returns>The <see cref="T:System.Windows.Forms.TreeNode" /> that was added to the collection.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Windows.Forms.TreeNode.Name%2A> property corresponds to the key for a <xref:System.Windows.Forms.TreeNode> in the <xref:System.Windows.Forms.TreeNodeCollection>.
You can also add new <xref:System.Windows.Forms.TreeNode> objects to the collection by using the <xref:System.Windows.Forms.TreeNodeCollection.AddRange%2A> or <xref:System.Windows.Forms.TreeNodeCollection.Insert%2A> methods.
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Add">
<MemberSignature Language="C#" Value="public virtual System.Windows.Forms.TreeNode Add (string key, string text, int imageIndex);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance class System.Windows.Forms.TreeNode Add(string key, string text, int32 imageIndex) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Add(System.String,System.String,System.Int32)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Function Add (key As String, text As String, imageIndex As Integer) As TreeNode" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual System::Windows::Forms::TreeNode ^ Add(System::String ^ key, System::String ^ text, int imageIndex);" />
<MemberSignature Language="F#" Value="abstract member Add : string * string * int -> System.Windows.Forms.TreeNode
override this.Add : string * string * int -> System.Windows.Forms.TreeNode" Usage="treeNodeCollection.Add (key, text, imageIndex)" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Windows.Forms.TreeNode</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="key" Type="System.String" Index="0" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="text" Type="System.String" Index="1" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="imageIndex" Type="System.Int32" Index="2" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
</Parameters>
<Docs>
<param name="key">The name of the tree node.</param>
<param name="text">The text to display in the tree node.</param>
<param name="imageIndex">The index of the image to display in the tree node.</param>
<summary>Creates a tree node with the specified key, text, and image, and adds it to the collection.</summary>
<returns>The <see cref="T:System.Windows.Forms.TreeNode" /> that was added to the collection.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Windows.Forms.TreeNode.Name%2A> property corresponds to the key for a <xref:System.Windows.Forms.TreeNode> in the <xref:System.Windows.Forms.TreeNodeCollection>.
The `imageIndex` parameter refers to an image in the <xref:System.Windows.Forms.TreeView.ImageList%2A> property of the parent <xref:System.Windows.Forms.TreeView>.
The tree node is added to the end of the collection. You can also add new <xref:System.Windows.Forms.TreeNode> objects to the collection by using the <xref:System.Windows.Forms.TreeNodeCollection.AddRange%2A> or <xref:System.Windows.Forms.TreeNodeCollection.Insert%2A> methods.
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Add">
<MemberSignature Language="C#" Value="public virtual System.Windows.Forms.TreeNode Add (string key, string text, string imageKey);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance class System.Windows.Forms.TreeNode Add(string key, string text, string imageKey) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Add(System.String,System.String,System.String)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Function Add (key As String, text As String, imageKey As String) As TreeNode" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual System::Windows::Forms::TreeNode ^ Add(System::String ^ key, System::String ^ text, System::String ^ imageKey);" />
<MemberSignature Language="F#" Value="abstract member Add : string * string * string -> System.Windows.Forms.TreeNode
override this.Add : string * string * string -> System.Windows.Forms.TreeNode" Usage="treeNodeCollection.Add (key, text, imageKey)" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Windows.Forms.TreeNode</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="key" Type="System.String" Index="0" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="text" Type="System.String" Index="1" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="imageKey" Type="System.String" Index="2" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
</Parameters>
<Docs>
<param name="key">The name of the tree node.</param>
<param name="text">The text to display in the tree node.</param>
<param name="imageKey">The image to display in the tree node.</param>
<summary>Creates a tree node with the specified key, text, and image, and adds it to the collection.</summary>
<returns>The <see cref="T:System.Windows.Forms.TreeNode" /> that was added to the collection.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Windows.Forms.TreeNode.Name%2A> property corresponds to the key for a <xref:System.Windows.Forms.TreeNode> in the <xref:System.Windows.Forms.TreeNodeCollection>.
The tree node is added to the end of the collection. You can also add new <xref:System.Windows.Forms.TreeNode> objects to the collection by using the <xref:System.Windows.Forms.TreeNodeCollection.AddRange%2A> or <xref:System.Windows.Forms.TreeNodeCollection.Insert%2A> methods.
The `imageKey` parameter refers to an image in the <xref:System.Windows.Forms.TreeView.ImageList%2A> property of the parent <xref:System.Windows.Forms.TreeView>.
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Add">
<MemberSignature Language="C#" Value="public virtual System.Windows.Forms.TreeNode Add (string key, string text, int imageIndex, int selectedImageIndex);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance class System.Windows.Forms.TreeNode Add(string key, string text, int32 imageIndex, int32 selectedImageIndex) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Add(System.String,System.String,System.Int32,System.Int32)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Function Add (key As String, text As String, imageIndex As Integer, selectedImageIndex As Integer) As TreeNode" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual System::Windows::Forms::TreeNode ^ Add(System::String ^ key, System::String ^ text, int imageIndex, int selectedImageIndex);" />
<MemberSignature Language="F#" Value="abstract member Add : string * string * int * int -> System.Windows.Forms.TreeNode
override this.Add : string * string * int * int -> System.Windows.Forms.TreeNode" Usage="treeNodeCollection.Add (key, text, imageIndex, selectedImageIndex)" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Windows.Forms.TreeNode</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="key" Type="System.String" Index="0" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="text" Type="System.String" Index="1" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="imageIndex" Type="System.Int32" Index="2" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="selectedImageIndex" Type="System.Int32" Index="3" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
</Parameters>
<Docs>
<param name="key">The name of the tree node.</param>
<param name="text">The text to display in the tree node.</param>
<param name="imageIndex">The index of the image to display in the tree node.</param>
<param name="selectedImageIndex">The index of the image to be displayed in the tree node when it is in a selected state.</param>
<summary>Creates a tree node with the specified key, text, and images, and adds it to the collection.</summary>
<returns>The tree node that was added to the collection.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Windows.Forms.TreeNode.Name%2A> property corresponds to the key for a <xref:System.Windows.Forms.TreeNode> in the <xref:System.Windows.Forms.TreeNodeCollection>.
The tree node is added to the end of the collection. You can also add new <xref:System.Windows.Forms.TreeNode> objects to the collection by using the <xref:System.Windows.Forms.TreeNodeCollection.AddRange%2A> or <xref:System.Windows.Forms.TreeNodeCollection.Insert%2A> methods.
The `imageIndex` parameter refers to an image in the <xref:System.Windows.Forms.TreeView.ImageList%2A> property of the parent <xref:System.Windows.Forms.TreeView>.
The `selectedImageIndex` parameter refers to an image in the <xref:System.Windows.Forms.TreeView.StateImageList%2A> property of the parent <xref:System.Windows.Forms.TreeView>.
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Add">
<MemberSignature Language="C#" Value="public virtual System.Windows.Forms.TreeNode Add (string key, string text, string imageKey, string selectedImageKey);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance class System.Windows.Forms.TreeNode Add(string key, string text, string imageKey, string selectedImageKey) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Add(System.String,System.String,System.String,System.String)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Function Add (key As String, text As String, imageKey As String, selectedImageKey As String) As TreeNode" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual System::Windows::Forms::TreeNode ^ Add(System::String ^ key, System::String ^ text, System::String ^ imageKey, System::String ^ selectedImageKey);" />
<MemberSignature Language="F#" Value="abstract member Add : string * string * string * string -> System.Windows.Forms.TreeNode
override this.Add : string * string * string * string -> System.Windows.Forms.TreeNode" Usage="treeNodeCollection.Add (key, text, imageKey, selectedImageKey)" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Windows.Forms.TreeNode</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="key" Type="System.String" Index="0" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="text" Type="System.String" Index="1" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="imageKey" Type="System.String" Index="2" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="selectedImageKey" Type="System.String" Index="3" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
</Parameters>
<Docs>
<param name="key">The name of the tree node.</param>
<param name="text">The text to display in the tree node.</param>
<param name="imageKey">The key of the image to display in the tree node.</param>
<param name="selectedImageKey">The key of the image to display when the node is in a selected state.</param>
<summary>Creates a tree node with the specified key, text, and images, and adds it to the collection.</summary>
<returns>The <see cref="T:System.Windows.Forms.TreeNode" /> that was added to the collection.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Windows.Forms.TreeNode.Name%2A> property corresponds to the key for a <xref:System.Windows.Forms.TreeNode> in the <xref:System.Windows.Forms.TreeNodeCollection>.
The tree node is added to the end of the collection. You can also add new <xref:System.Windows.Forms.TreeNode> objects to the collection by using the <xref:System.Windows.Forms.TreeNodeCollection.AddRange%2A> or <xref:System.Windows.Forms.TreeNodeCollection.Insert%2A> methods.
The `imageKey` parameter refers to an image in the <xref:System.Windows.Forms.TreeView.ImageList%2A> property of the parent <xref:System.Windows.Forms.TreeView>.
The `selectedImageKey` parameter refers to an image in the <xref:System.Windows.Forms.TreeView.StateImageList%2A> property of the parent <xref:System.Windows.Forms.TreeView>.
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="AddRange">
<MemberSignature Language="C#" Value="public virtual void AddRange (System.Windows.Forms.TreeNode[] nodes);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance void AddRange(class System.Windows.Forms.TreeNode[] nodes) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.AddRange(System.Windows.Forms.TreeNode[])" />
<MemberSignature Language="VB.NET" Value="Public Overridable Sub AddRange (nodes As TreeNode())" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual void AddRange(cli::array <System::Windows::Forms::TreeNode ^> ^ nodes);" />
<MemberSignature Language="F#" Value="abstract member AddRange : System.Windows.Forms.TreeNode[] -> unit
override this.AddRange : System.Windows.Forms.TreeNode[] -> unit" Usage="treeNodeCollection.AddRange nodes" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="nodes" Type="System.Windows.Forms.TreeNode[]" />
</Parameters>
<Docs>
<param name="nodes">An array of <see cref="T:System.Windows.Forms.TreeNode" /> objects representing the tree nodes to add to the collection.</param>
<summary>Adds an array of previously created tree nodes to the collection.</summary>
<remarks>
<format type="text/markdown"><]
[!code-csharp[TreeNodeCollection_Clear#1](~/samples/snippets/csharp/VS_Snippets_Winforms/TreeNodeCollection_Clear/CS/treenodecollection_clear.cs#1)]
[!code-vb[TreeNodeCollection_Clear#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/TreeNodeCollection_Clear/VB/treenodecollection_clear.vb#1)]
]]></format>
</remarks>
<exception cref="T:System.ArgumentNullException">
<paramref name="nodes" /> is <see langword="null" />.</exception>
<exception cref="T:System.ArgumentException">
<paramref name="nodes" /> is the child of another <see cref="T:System.Windows.Forms.TreeView" />.</exception>
<altmember cref="M:System.Windows.Forms.TreeNodeCollection.Add(System.String)" />
<altmember cref="M:System.Windows.Forms.TreeNodeCollection.CopyTo(System.Array,System.Int32)" />
</Docs>
</Member>
<Member MemberName="Clear">
<MemberSignature Language="C#" Value="public virtual void Clear ();" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance void Clear() cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Clear" />
<MemberSignature Language="VB.NET" Value="Public Overridable Sub Clear ()" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual void Clear();" />
<MemberSignature Language="F#" Value="abstract member Clear : unit -> unit
override this.Clear : unit -> unit" Usage="treeNodeCollection.Clear " />
<MemberType>Method</MemberType>
<Implements>
<InterfaceMember>M:System.Collections.IList.Clear</InterfaceMember>
</Implements>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Removes all tree nodes from the collection.</summary>
<remarks>
<format type="text/markdown"><]
[!code-csharp[TreeNodeCollection_Clear#1](~/samples/snippets/csharp/VS_Snippets_Winforms/TreeNodeCollection_Clear/CS/treenodecollection_clear.cs#1)]
[!code-vb[TreeNodeCollection_Clear#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/TreeNodeCollection_Clear/VB/treenodecollection_clear.vb#1)]
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Contains">
<MemberSignature Language="C#" Value="public bool Contains (System.Windows.Forms.TreeNode node);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig instance bool Contains(class System.Windows.Forms.TreeNode node) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Contains(System.Windows.Forms.TreeNode)" />
<MemberSignature Language="VB.NET" Value="Public Function Contains (node As TreeNode) As Boolean" />
<MemberSignature Language="C++ CLI" Value="public:
 bool Contains(System::Windows::Forms::TreeNode ^ node);" />
<MemberSignature Language="F#" Value="member this.Contains : System.Windows.Forms.TreeNode -> bool" Usage="treeNodeCollection.Contains node" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="node" Type="System.Windows.Forms.TreeNode" />
</Parameters>
<Docs>
<param name="node">The <see cref="T:System.Windows.Forms.TreeNode" /> to locate in the collection.</param>
<summary>Determines whether the specified tree node is a member of the collection.</summary>
<returns>
<see langword="true" /> if the <see cref="T:System.Windows.Forms.TreeNode" /> is a member of the collection; otherwise, <see langword="false" />.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
This method enables you to determine whether a <xref:System.Windows.Forms.TreeNode> is a member of the collection before attempting to perform operations on the <xref:System.Windows.Forms.TreeNode>. You can use this method to confirm that a <xref:System.Windows.Forms.TreeNode> has been added to or is still a member of the collection.
The amount of time this method takes is proportional to the size of the node collection, so you may want to avoid using it with large collections.
This method checks for reference equality only. You cannot use it to determine whether an equivalent but different node is in the collection.
> [!NOTE]
> One implication of the reference-equality requirement is that you cannot customize the behavior of this method for derived <xref:System.Windows.Forms.TreeNode> types by overriding the <xref:System.Object.Equals%2A> method of the <xref:System.Windows.Forms.TreeNode> class.
## Examples
The following code example determines if a specified <xref:System.Windows.Forms.TreeNode> is within a <xref:System.Windows.Forms.TreeNodeCollection>, and then enumerates the collection. This example requires that you have a <xref:System.Windows.Forms.Form> with a <xref:System.Windows.Forms.TreeView> that has a <xref:System.Windows.Forms.TreeNodeCollection> that contains a <xref:System.Windows.Forms.TreeNode> named `myTreeNode2`.
[!code-cpp[TreeNodeCollection_Contains_GetEnumerator#1](~/samples/snippets/cpp/VS_Snippets_Winforms/TreeNodeCollection_Contains_GetEnumerator/CPP/treenodecollection_contains_getenumerator.cpp#1)]
[!code-csharp[TreeNodeCollection_Contains_GetEnumerator#1](~/samples/snippets/csharp/VS_Snippets_Winforms/TreeNodeCollection_Contains_GetEnumerator/CS/treenodecollection_contains_getenumerator.cs#1)]
[!code-vb[TreeNodeCollection_Contains_GetEnumerator#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/TreeNodeCollection_Contains_GetEnumerator/VB/treenodecollection_contains_getenumerator.vb#1)]
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="ContainsKey">
<MemberSignature Language="C#" Value="public virtual bool ContainsKey (string key);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance bool ContainsKey(string key) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.ContainsKey(System.String)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Function ContainsKey (key As String) As Boolean" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual bool ContainsKey(System::String ^ key);" />
<MemberSignature Language="F#" Value="abstract member ContainsKey : string -> bool
override this.ContainsKey : string -> bool" Usage="treeNodeCollection.ContainsKey key" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="key" Type="System.String" Index="0" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
</Parameters>
<Docs>
<param name="key">The name of the <see cref="T:System.Windows.Forms.TreeNode" /> to search for.</param>
<summary>Determines whether the collection contains a tree node with the specified key.</summary>
<returns>
<see langword="true" /> to indicate the collection contains a <see cref="T:System.Windows.Forms.TreeNode" /> with the specified key; otherwise, <see langword="false" />.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Windows.Forms.TreeNode.Name%2A> property corresponds to the key for a <xref:System.Windows.Forms.TreeNode> in the <xref:System.Windows.Forms.TreeNodeCollection>.
The key comparison is not case-sensitive. If the `key` parameter is `null` or an empty string, the <xref:System.Windows.Forms.TreeNodeCollection.Item%2A> property returns `false`.
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="CopyTo">
<MemberSignature Language="C#" Value="public void CopyTo (Array dest, int index);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance void CopyTo(class System.Array dest, int32 index) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.CopyTo(System.Array,System.Int32)" />
<MemberSignature Language="VB.NET" Value="Public Sub CopyTo (dest As Array, index As Integer)" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual void CopyTo(Array ^ dest, int index);" />
<MemberSignature Language="F#" Value="abstract member CopyTo : Array * int -> unit
override this.CopyTo : Array * int -> unit" Usage="treeNodeCollection.CopyTo (dest, index)" />
<MemberType>Method</MemberType>
<Implements>
<InterfaceMember>M:System.Collections.ICollection.CopyTo(System.Array,System.Int32)</InterfaceMember>
</Implements>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="dest" Type="System.Array" />
<Parameter Name="index" Type="System.Int32" />
</Parameters>
<Docs>
<param name="dest">The destination array.</param>
<param name="index">The index in the destination array at which storing begins.</param>
<summary>Copies the entire collection into an existing array at a specified location within the array.</summary>
<remarks>
<format type="text/markdown"><]
[!code-csharp[TreeNodeCollection_Count_CopyTo#1](~/samples/snippets/csharp/VS_Snippets_Winforms/TreeNodeCollection_Count_CopyTo/CS/treenodecollection_count_copyto.cs#1)]
[!code-vb[TreeNodeCollection_Count_CopyTo#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/TreeNodeCollection_Count_CopyTo/VB/treenodecollection_count_copyto.vb#1)]
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Count">
<MemberSignature Language="C#" Value="public int Count { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance int32 Count" />
<MemberSignature Language="DocId" Value="P:System.Windows.Forms.TreeNodeCollection.Count" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property Count As Integer" />
<MemberSignature Language="C++ CLI" Value="public:
 property int Count { int get(); };" />
<MemberSignature Language="F#" Value="member this.Count : int" Usage="System.Windows.Forms.TreeNodeCollection.Count" />
<MemberType>Property</MemberType>
<Implements>
<InterfaceMember>P:System.Collections.ICollection.Count</InterfaceMember>
</Implements>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName Language="C#">[System.ComponentModel.Browsable(false)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.Browsable(false)>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="netframework-1.1">
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the total number of <see cref="T:System.Windows.Forms.TreeNode" /> objects in the collection.</summary>
<value>The total number of <see cref="T:System.Windows.Forms.TreeNode" /> objects in the collection.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Windows.Forms.TreeNodeCollection.Count%2A> property holds the number of <xref:System.Windows.Forms.TreeNode> objects assigned to the collection. You can use the <xref:System.Windows.Forms.TreeNodeCollection.Count%2A> property value as the upper bounds of a loop to iterate through a collection.
> [!NOTE]
> Because the index value of a collection is a zero-based index, you must subtract one from the looping variable. If you do not account for this, you will exceed the upper bounds of the collection and throw an <xref:System.IndexOutOfRangeException> exception.
## Examples
The following code example displays the number of <xref:System.Windows.Forms.TreeNode> objects in a <xref:System.Windows.Forms.TreeNodeCollection>, copies the contents of the collection to an <xref:System.Object> array, and displays a list of the tree nodes in a <xref:System.Windows.Forms.Label> control. This example requires that you have a <xref:System.Windows.Forms.TreeView> with at least one <xref:System.Windows.Forms.TreeNode> in its <xref:System.Windows.Forms.TreeNodeCollection>, and a <xref:System.Windows.Forms.Label> control on a <xref:System.Windows.Forms.Form>.
[!code-cpp[TreeNodeCollection_Count_CopyTo#1](~/samples/snippets/cpp/VS_Snippets_Winforms/TreeNodeCollection_Count_CopyTo/CPP/treenodecollection_count_copyto.cpp#1)]
[!code-csharp[TreeNodeCollection_Count_CopyTo#1](~/samples/snippets/csharp/VS_Snippets_Winforms/TreeNodeCollection_Count_CopyTo/CS/treenodecollection_count_copyto.cs#1)]
[!code-vb[TreeNodeCollection_Count_CopyTo#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/TreeNodeCollection_Count_CopyTo/VB/treenodecollection_count_copyto.vb#1)]
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Find">
<MemberSignature Language="C#" Value="public System.Windows.Forms.TreeNode[] Find (string key, bool searchAllChildren);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig instance class System.Windows.Forms.TreeNode[] Find(string key, bool searchAllChildren) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Find(System.String,System.Boolean)" />
<MemberSignature Language="VB.NET" Value="Public Function Find (key As String, searchAllChildren As Boolean) As TreeNode()" />
<MemberSignature Language="C++ CLI" Value="public:
 cli::array <System::Windows::Forms::TreeNode ^> ^ Find(System::String ^ key, bool searchAllChildren);" />
<MemberSignature Language="F#" Value="member this.Find : string * bool -> System.Windows.Forms.TreeNode[]" Usage="treeNodeCollection.Find (key, searchAllChildren)" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Windows.Forms.TreeNode[]</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="key" Type="System.String" Index="0" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="searchAllChildren" Type="System.Boolean" Index="1" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
</Parameters>
<Docs>
<param name="key">The name of the tree node to search for.</param>
<param name="searchAllChildren">
<see langword="true" /> to search child nodes of tree nodes; otherwise, <see langword="false" />.</param>
<summary>Finds the tree nodes with specified key, optionally searching subnodes.</summary>
<returns>An array of <see cref="T:System.Windows.Forms.TreeNode" /> objects whose <see cref="P:System.Windows.Forms.TreeNode.Name" /> property matches the specified key.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Windows.Forms.TreeNode.Name%2A> property corresponds to the key for a <xref:System.Windows.Forms.TreeNode> in the <xref:System.Windows.Forms.TreeNodeCollection>.
The key comparison is not case-sensitive. If the `key` parameter is `null` or an empty string, or there are no matches, the <xref:System.Windows.Forms.TreeNodeCollection.Item%2A> property returns an empty array`.`
]]></format>
</remarks>
<exception cref="T:System.ArgumentNullException">.NET 5.0 and later: <paramref name="key" /> is <see langword="null" /> or empty.</exception>
</Docs>
</Member>
<Member MemberName="GetEnumerator">
<MemberSignature Language="C#" Value="public System.Collections.IEnumerator GetEnumerator ();" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance class System.Collections.IEnumerator GetEnumerator() cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.GetEnumerator" />
<MemberSignature Language="VB.NET" Value="Public Function GetEnumerator () As IEnumerator" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual System::Collections::IEnumerator ^ GetEnumerator();" />
<MemberSignature Language="F#" Value="abstract member GetEnumerator : unit -> System.Collections.IEnumerator
override this.GetEnumerator : unit -> System.Collections.IEnumerator" Usage="treeNodeCollection.GetEnumerator " />
<MemberType>Method</MemberType>
<Implements>
<InterfaceMember>M:System.Collections.IEnumerable.GetEnumerator</InterfaceMember>
</Implements>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Collections.IEnumerator</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Returns an enumerator that can be used to iterate through the tree node collection.</summary>
<returns>An <see cref="T:System.Collections.IEnumerator" /> that represents the tree node collection.</returns>
<remarks>
<format type="text/markdown"><]
[!code-csharp[TreeNodeCollection_Contains_GetEnumerator#1](~/samples/snippets/csharp/VS_Snippets_Winforms/TreeNodeCollection_Contains_GetEnumerator/CS/treenodecollection_contains_getenumerator.cs#1)]
[!code-vb[TreeNodeCollection_Contains_GetEnumerator#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/TreeNodeCollection_Contains_GetEnumerator/VB/treenodecollection_contains_getenumerator.vb#1)]
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="IndexOf">
<MemberSignature Language="C#" Value="public int IndexOf (System.Windows.Forms.TreeNode node);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig instance int32 IndexOf(class System.Windows.Forms.TreeNode node) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.IndexOf(System.Windows.Forms.TreeNode)" />
<MemberSignature Language="VB.NET" Value="Public Function IndexOf (node As TreeNode) As Integer" />
<MemberSignature Language="C++ CLI" Value="public:
 int IndexOf(System::Windows::Forms::TreeNode ^ node);" />
<MemberSignature Language="F#" Value="member this.IndexOf : System.Windows.Forms.TreeNode -> int" Usage="treeNodeCollection.IndexOf node" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="node" Type="System.Windows.Forms.TreeNode" />
</Parameters>
<Docs>
<param name="node">The <see cref="T:System.Windows.Forms.TreeNode" /> to locate in the collection.</param>
<summary>Returns the index of the specified tree node in the collection.</summary>
<returns>The zero-based index of the item found in the tree node collection; otherwise, -1.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The amount of time this method takes is proportional to the size of the node collection, so you may want to avoid using it with large collections.
This method checks for reference equality only. You cannot use it to retrieve the index of an equivalent but different node in the collection.
> [!NOTE]
> One implication of the reference-equality requirement is that you cannot customize the behavior of this method for derived <xref:System.Windows.Forms.TreeNode> types by overriding the <xref:System.Object.Equals%2A> method of the <xref:System.Windows.Forms.TreeNode> class.
## Examples
The following code example determines if a specified <xref:System.Windows.Forms.TreeNode> is within a <xref:System.Windows.Forms.TreeNodeCollection>, and then enumerates the collection. This example requires that you have a <xref:System.Windows.Forms.Form> with a <xref:System.Windows.Forms.TreeView> that has a <xref:System.Windows.Forms.TreeNodeCollection> that contains a <xref:System.Windows.Forms.TreeNode> named `myTreeNode2`.
[!code-cpp[TreeNodeCollection_Contains_GetEnumerator#2](~/samples/snippets/cpp/VS_Snippets_Winforms/TreeNodeCollection_Contains_GetEnumerator/CPP/treenodecollection_contains_getenumerator.cpp#2)]
[!code-csharp[TreeNodeCollection_Contains_GetEnumerator#2](~/samples/snippets/csharp/VS_Snippets_Winforms/TreeNodeCollection_Contains_GetEnumerator/CS/treenodecollection_contains_getenumerator.cs#2)]
[!code-vb[TreeNodeCollection_Contains_GetEnumerator#2](~/samples/snippets/visualbasic/VS_Snippets_Winforms/TreeNodeCollection_Contains_GetEnumerator/VB/treenodecollection_contains_getenumerator.vb#2)]
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="IndexOfKey">
<MemberSignature Language="C#" Value="public virtual int IndexOfKey (string key);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance int32 IndexOfKey(string key) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.IndexOfKey(System.String)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Function IndexOfKey (key As String) As Integer" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual int IndexOfKey(System::String ^ key);" />
<MemberSignature Language="F#" Value="abstract member IndexOfKey : string -> int
override this.IndexOfKey : string -> int" Usage="treeNodeCollection.IndexOfKey key" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="key" Type="System.String" Index="0" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
</Parameters>
<Docs>
<param name="key">The name of the tree node to search for.</param>
<summary>Returns the index of the first occurrence of a tree node with the specified key.</summary>
<returns>The zero-based index of the first occurrence of a tree node with the specified key, if found; otherwise, -1.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
If <xref:System.Windows.Forms.TreeNodeCollection.IndexOfKey%2A> is called successively, the last returned index will be checked for a key match first, and if there is no match, the search starts at the beginning of the collection.
The <xref:System.Windows.Forms.TreeNode.Name%2A> property corresponds to the key for a <xref:System.Windows.Forms.TreeNode> in the <xref:System.Windows.Forms.TreeNodeCollection>.
The key comparison is not case-sensitive. If `key` is `null` or an empty string, the <xref:System.Windows.Forms.TreeNodeCollection.Item%2A> property returns -1.
]]></format>
</remarks>
</Docs>
</Member>
<MemberGroup MemberName="Insert">
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Docs>
<summary>Inserts an item in the collection at a specified location.</summary>
</Docs>
</MemberGroup>
<Member MemberName="Insert">
<MemberSignature Language="C#" Value="public virtual System.Windows.Forms.TreeNode Insert (int index, string text);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance class System.Windows.Forms.TreeNode Insert(int32 index, string text) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Insert(System.Int32,System.String)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Function Insert (index As Integer, text As String) As TreeNode" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual System::Windows::Forms::TreeNode ^ Insert(int index, System::String ^ text);" />
<MemberSignature Language="F#" Value="abstract member Insert : int * string -> System.Windows.Forms.TreeNode
override this.Insert : int * string -> System.Windows.Forms.TreeNode" Usage="treeNodeCollection.Insert (index, text)" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Windows.Forms.TreeNode</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="index" Type="System.Int32" Index="0" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="text" Type="System.String" Index="1" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
</Parameters>
<Docs>
<param name="index">The location within the collection to insert the node.</param>
<param name="text">The text to display in the tree node.</param>
<summary>Creates a tree node with the specified text and inserts it at the specified index.</summary>
<returns>The <see cref="T:System.Windows.Forms.TreeNode" /> that was inserted in the collection.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
If the <xref:System.Windows.Forms.TreeView.Sorted%2A> property is set to `true`, the `index` parameter value is ignored. The <xref:System.Windows.Forms.TreeNode> is inserted into the tree view and the <xref:System.Windows.Forms.TreeView> is sorted again.
You can also add new <xref:System.Windows.Forms.TreeNode> objects to the collection by using the <xref:System.Windows.Forms.TreeNodeCollection.Add%2A> or <xref:System.Windows.Forms.TreeNodeCollection.AddRange%2A> methods.
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Insert">
<MemberSignature Language="C#" Value="public virtual void Insert (int index, System.Windows.Forms.TreeNode node);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance void Insert(int32 index, class System.Windows.Forms.TreeNode node) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Insert(System.Int32,System.Windows.Forms.TreeNode)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Sub Insert (index As Integer, node As TreeNode)" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual void Insert(int index, System::Windows::Forms::TreeNode ^ node);" />
<MemberSignature Language="F#" Value="abstract member Insert : int * System.Windows.Forms.TreeNode -> unit
override this.Insert : int * System.Windows.Forms.TreeNode -> unit" Usage="treeNodeCollection.Insert (index, node)" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="index" Type="System.Int32" />
<Parameter Name="node" Type="System.Windows.Forms.TreeNode" />
</Parameters>
<Docs>
<param name="index">The indexed location within the collection to insert the tree node.</param>
<param name="node">The <see cref="T:System.Windows.Forms.TreeNode" /> to insert into the collection.</param>
<summary>Inserts an existing tree node into the tree node collection at the specified location.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
If the <xref:System.Windows.Forms.TreeView.Sorted%2A?displayProperty=nameWithType> property is set to `true`, the `index` parameter value is ignored. The <xref:System.Windows.Forms.TreeNode> is inserted into the tree view, and the <xref:System.Windows.Forms.TreeView> resorted.
You can also add new <xref:System.Windows.Forms.TreeNode> objects to the collection by using the <xref:System.Windows.Forms.TreeNodeCollection.Add%2A> or <xref:System.Windows.Forms.TreeNodeCollection.AddRange%2A> methods.
To remove a <xref:System.Windows.Forms.TreeNode> that you previously added, use the <xref:System.Windows.Forms.TreeNodeCollection.Remove%2A>, <xref:System.Windows.Forms.TreeNodeCollection.RemoveAt%2A>, or <xref:System.Windows.Forms.TreeNodeCollection.Clear%2A> methods.
> [!NOTE]
> A <xref:System.Windows.Forms.TreeNode> can be assigned to only one <xref:System.Windows.Forms.TreeView> control at a time. To add the tree node to a new tree view control, you must remove it from the other tree view first or clone it.
## Examples
The following code example removes the selected tree node from one <xref:System.Windows.Forms.TreeView> and adds it to another if both tree node collections are not read-only. When a <xref:System.Windows.Forms.Button> is clicked, the <xref:System.Windows.Forms.TreeNode> represented by the <xref:System.Windows.Forms.TreeView.SelectedNode%2A?displayProperty=nameWithType> property is deleted from one <xref:System.Windows.Forms.TreeView> using the <xref:System.Windows.Forms.TreeNodeCollection.Remove%2A> method and added to the other <xref:System.Windows.Forms.TreeView> using the <xref:System.Windows.Forms.TreeNodeCollection.Insert%2A> method. This example requires that you have a <xref:System.Windows.Forms.Form> that contains two <xref:System.Windows.Forms.TreeView> controls and a <xref:System.Windows.Forms.Button>. The <xref:System.Windows.Forms.TreeView> controls should be named `treeView1` and `treeView2`.
[!code-cpp[TreeNodeCollection#1](~/samples/snippets/cpp/VS_Snippets_Winforms/TreeNodeCollection/CPP/treenodecollection.cpp#1)]
[!code-csharp[TreeNodeCollection#1](~/samples/snippets/csharp/VS_Snippets_Winforms/TreeNodeCollection/CS/treenodecollection.cs#1)]
[!code-vb[TreeNodeCollection#1](~/samples/snippets/visualbasic/VS_Snippets_Winforms/TreeNodeCollection/VB/treenodecollection.vb#1)]
]]></format>
</remarks>
<exception cref="T:System.ArgumentException">The <paramref name="node" /> is currently assigned to another <see cref="T:System.Windows.Forms.TreeView" />.</exception>
</Docs>
</Member>
<Member MemberName="Insert">
<MemberSignature Language="C#" Value="public virtual System.Windows.Forms.TreeNode Insert (int index, string key, string text);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance class System.Windows.Forms.TreeNode Insert(int32 index, string key, string text) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Windows.Forms.TreeNodeCollection.Insert(System.Int32,System.String,System.String)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Function Insert (index As Integer, key As String, text As String) As TreeNode" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual System::Windows::Forms::TreeNode ^ Insert(int index, System::String ^ key, System::String ^ text);" />
<MemberSignature Language="F#" Value="abstract member Insert : int * string * string -> System.Windows.Forms.TreeNode
override this.Insert : int * string * string -> System.Windows.Forms.TreeNode" Usage="treeNodeCollection.Insert (index, key, text)" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Windows.Forms</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Windows.Forms.TreeNode</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="index" Type="System.Int32" Index="0" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="key" Type="System.String" Index="1" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
<Parameter Name="text" Type="System.String" Index="2" FrameworkAlternate="net-5.0;netcore-3.0;netcore-3.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8" />
</Parameters>
<Docs>
<param name="index">The location within the collection to insert the node.</param>
<param name="key">The name of the tree node.</param>
<param name="text">The text to display in the tree node.</param>
<summary>Creates a tree node with the specified text and key, and inserts it into the collection.</summary>
<returns>The <see cref="T:System.Windows.Forms.TreeNode" /> that was inserted in the collection.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
If the <xref:System.Windows.Forms.TreeView.Sorted%2A> property is set to `true`, the `index` parameter value is ignored. The <xref:System.Windows.Forms.TreeNode> is inserted into the tree view and the <xref:System.Windows.Forms.TreeView> is sorted again.
You can also add new <xref:System.Windows.Forms.TreeNode> objects to the collection by using the <xref:System.Windows.Forms.TreeNodeCollection.Add%2A> or <xref:System.Windows.Forms.TreeNodeCollection.AddRange%2A> methods.
The <xref:System.Windows.Forms.TreeNode.Name%2A> property corresponds to the key for a <xref:System.Windows.Forms.TreeNode> in the <xref:System.Windows.Forms.TreeNodeCollection>.
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Insert">