Key item added to KeyNotFoundException

src/Common/src/System/Collections/Generic/LowLevelDictionary.cs

@@ -62,7 +62,7 @@ public TValue this[TKey key]
 
                 Entry entry = Find(key);
                 if (entry == null)
-                    throw new KeyNotFoundException();
+                    throw new KeyNotFoundException(SR.Format(SR.Arg_KeyNotFoundWithKey, key.ToString()));
                 return entry._value;
             }
             set

src/Microsoft.Diagnostics.Tracing.EventSource.Redist/shared/TraceLogging/EventPayload.cs

@@ -53,7 +53,7 @@ public object this[string key]
                     position++;
                 }
 
-                throw new System.Collections.Generic.KeyNotFoundException();
+                throw new System.Collections.Generic.KeyNotFoundException(SR.Format(SR.Arg_KeyNotFoundWithKey, key.ToString()));
             }
             set
             {

src/System.Collections.Concurrent/src/Resources/Strings.resx

@@ -181,4 +181,7 @@
   <data name="ConcurrentBag_Enumerator_EnumerationNotStartedOrAlreadyFinished" xml:space="preserve">
     <value>Enumeration has either not started or has already finished.</value>
   </data>
+  <data name="Arg_KeyNotFoundWithKey" xml:space="preserve">
+    <value>The given key '{0}' was not present in the dictionary.</value>
+  </data>
 </root>

src/System.Collections.Concurrent/src/System/Collections/Concurrent/ConcurrentDictionary.cs

@@ -877,7 +877,7 @@ public TValue this[TKey key]
                 TValue value;
                 if (!TryGetValue(key, out value))
                 {
-                    ThrowKeyNotFoundException();
+                    ThrowKeyNotFoundException(key);
                 }
                 return value;
             }
@@ -894,9 +894,9 @@ public TValue this[TKey key]
         // of important methods like TryGetValue and ContainsKey.
 
         [MethodImpl(MethodImplOptions.NoInlining)]
-        private static void ThrowKeyNotFoundException()
+        private static void ThrowKeyNotFoundException(object key)
         {
-            throw new KeyNotFoundException();
+            throw new KeyNotFoundException(SR.Format(SR.Arg_KeyNotFoundWithKey, key.ToString()));
         }
 
         [MethodImpl(MethodImplOptions.NoInlining)]

src/System.Collections.Immutable/src/Resources/Strings.resx

@@ -58,6 +58,9 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
+  <data name="Arg_KeyNotFoundWithKey" xml:space="preserve">
+    <value>The given key '{0}' was not present in the dictionary.</value>
+  </data>
   <data name="ArrayInitializedStateNotEqual" xml:space="preserve">
     <value>Object is not an array with the same initialization state as the array to compare it to.</value>
   </data>

src/System.Collections.Immutable/src/System/Collections/Immutable/ImmutableDictionary_2.Builder.cs

@@ -419,7 +419,7 @@ public TValue this[TKey key]
                         return value;
                     }
 
-                    throw new KeyNotFoundException();
+                    throw new KeyNotFoundException(SR.Format(SR.Arg_KeyNotFoundWithKey, key.ToString()));
                 }
 
                 set

src/System.Collections.Immutable/src/System/Collections/Immutable/ImmutableSortedDictionary_2.Builder.cs

@@ -188,7 +188,7 @@ public TValue this[TKey key]
                         return value;
                     }
 
-                    throw new KeyNotFoundException();
+                    throw new KeyNotFoundException(SR.Format(SR.Arg_KeyNotFoundWithKey, key.ToString()));
                 }
 
                 set

src/System.Collections.Immutable/src/System/Collections/Immutable/ImmutableSortedDictionary_2.cs

@@ -208,7 +208,7 @@ public TValue this[TKey key]
                     return value;
                 }
 
-                throw new KeyNotFoundException();
+                throw new KeyNotFoundException(SR.Format(SR.Arg_KeyNotFoundWithKey, key.ToString()));
             }
         }
 

src/System.Collections/src/Resources/Strings.resx

@@ -160,4 +160,7 @@
   <data name="Serialization_MissingValues" xml:space="preserve">
     <value>The values for this dictionary are missing.</value>
   </data>
-</root>
+  <data name="Arg_KeyNotFoundWithKey" xml:space="preserve">
+    <value>The given key '{0}' was not present in the dictionary.</value>
+  </data>
+</root>

src/System.Collections/src/System/Collections/Generic/SortedDictionary.cs

@@ -108,7 +108,7 @@ public TValue this[TKey key]
                 TreeSet<KeyValuePair<TKey, TValue>>.Node node = _set.FindNode(new KeyValuePair<TKey, TValue>(key, default(TValue)));
                 if (node == null)
                 {
-                    throw new KeyNotFoundException();
+                    throw new KeyNotFoundException(SR.Format(SR.Arg_KeyNotFoundWithKey, key.ToString()));
                 }
 
                 return node.Item.Value;

src/System.Collections/src/System/Collections/Generic/SortedList.cs

@@ -597,7 +597,7 @@ public TValue this[TKey key]
                 if (i >= 0)
                     return values[i];
 
-                throw new KeyNotFoundException();
+                throw new KeyNotFoundException(SR.Format(SR.Arg_KeyNotFoundWithKey, key.ToString()));
             }
             set
             {

src/System.Linq.Expressions/src/Resources/Strings.resx

@@ -565,4 +565,7 @@
   <data name="SameKeyExistsInExpando" xml:space="preserve">
     <value>An element with the same key '{0}' already exists in the ExpandoObject.</value>
   </data>
+  <data name="Arg_KeyNotFoundWithKey" xml:space="preserve">
+    <value>The given key '{0}' was not present in the dictionary.</value>
+  </data>
 </root>

src/System.Linq.Expressions/src/System/Linq/Expressions/Interpreter/Utilities.cs

@@ -286,7 +286,7 @@ public TValue this[TKey key]
                     return res;
                 }
 
-                throw new KeyNotFoundException();
+                throw new KeyNotFoundException(SR.Format(SR.Arg_KeyNotFoundWithKey, key.ToString()));
             }
             set
             {

src/System.ObjectModel/src/Resources/Strings.resx

@@ -103,4 +103,7 @@
   <data name="Argument_InvalidArrayType" xml:space="preserve">
     <value>Target array type is not compatible with the type of items in the collection.</value>
   </data>
+  <data name="Arg_KeyNotFoundWithKey" xml:space="preserve">
+    <value>The given key '{0}' was not present in the dictionary.</value>
+  </data>
 </root>

src/System.ObjectModel/src/System/Collections/ObjectModel/KeyedCollection.cs

@@ -80,7 +80,7 @@ public TItem this[TKey key]
                     return item;
                 }
 
-                throw new KeyNotFoundException();
+                throw new KeyNotFoundException(SR.Format(SR.Arg_KeyNotFoundWithKey, key.ToString()));
             }
         }
 

src/System.Private.Uri/src/Resources/Strings.resx

@@ -189,4 +189,7 @@
   <data name="Argument_InvalidUriSubcomponent" xml:space="preserve">
     <value>The subcomponent, {0}, of this uri is not valid.</value>
   </data>
-</root>
+  <data name="Arg_KeyNotFoundWithKey" xml:space="preserve">
+    <value>The given key '{0}' was not present in the dictionary.</value>
+  </data>
+</root>

src/System.Runtime.Extensions/src/Resources/Strings.resx

@@ -417,4 +417,7 @@
   <data name="IO_PathTooLong_Path" xml:space="preserve">
     <value>The path '{0}' is too long, or a component of the specified path is too long.</value>
   </data>
+  <data name="Arg_KeyNotFoundWithKey" xml:space="preserve">
+    <value>The given key '{0}' was not present in the dictionary.</value>
+  </data>
 </root>