From abc12d8d68bdfff73f9afa95220a2f375a400e9d Mon Sep 17 00:00:00 2001
From: Luke Latham <1622880+guardrex@users.noreply.github.com>
Date: Fri, 9 Jul 2021 06:22:07 -0500
Subject: [PATCH 1/3] Required Blazor parameters

---
 aspnetcore/blazor/components/index.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/aspnetcore/blazor/components/index.md b/aspnetcore/blazor/components/index.md
index 8de35bf1981c..44207896c1f7 100644
--- a/aspnetcore/blazor/components/index.md
+++ b/aspnetcore/blazor/components/index.md
@@ -513,6 +513,18 @@ public DateTime StartData { get; set; } = DateTime.Now;
 
 After the initial assignment of <xref:System.DateTime.Now?displayProperty=nameWithType>, do **not** assign a value to `StartData` in developer code. For more information, see the [Overwritten parameters](#overwritten-parameters) section of this article.
 
+::: moniker range=">= aspnetcore-6.0"
+
+Apply the `[EditorRequired]` attribute to specify a required component parameter. If a parameter value isn't provided, editors or build tools may display warnings to the user. This attribute is only valid on properties also marked with the `[Parameter]` attribute.
+
+```csharp
+[Parameter]
+[EditorRequired]
+public string Title { get; set; }
+```
+
+::: moniker-end
+
 ## Route parameters
 
 Components can specify route parameters in the route template of the [`@page`][9] directive. The [Blazor router](xref:blazor/fundamentals/routing) uses route parameters to populate corresponding component parameters.

From e3d753373b7bf2ebfe9fcae4f686672f4784c1b7 Mon Sep 17 00:00:00 2001
From: Luke Latham <1622880+guardrex@users.noreply.github.com>
Date: Fri, 9 Jul 2021 14:43:44 -0500
Subject: [PATCH 2/3] Updates

---
 aspnetcore/blazor/components/index.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/aspnetcore/blazor/components/index.md b/aspnetcore/blazor/components/index.md
index 44207896c1f7..4886aea5e680 100644
--- a/aspnetcore/blazor/components/index.md
+++ b/aspnetcore/blazor/components/index.md
@@ -523,6 +523,13 @@ Apply the `[EditorRequired]` attribute to specify a required component parameter
 public string Title { get; set; }
 ```
 
+Single-line attribute lists are also supported:
+
+```csharp
+[Parameter, EditorRequired]
+public string Title { get; set; }
+```
+
 ::: moniker-end
 
 ## Route parameters

From fab52330e489653730c7f4605c6012a551ec8f1f Mon Sep 17 00:00:00 2001
From: Luke Latham <1622880+guardrex@users.noreply.github.com>
Date: Thu, 15 Jul 2021 05:09:13 -0500
Subject: [PATCH 3/3] Updates

---
 aspnetcore/blazor/components/index.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/aspnetcore/blazor/components/index.md b/aspnetcore/blazor/components/index.md
index 4886aea5e680..9c36ce20c4b9 100644
--- a/aspnetcore/blazor/components/index.md
+++ b/aspnetcore/blazor/components/index.md
@@ -515,7 +515,7 @@ After the initial assignment of <xref:System.DateTime.Now?displayProperty=nameWi
 
 ::: moniker range=">= aspnetcore-6.0"
 
-Apply the `[EditorRequired]` attribute to specify a required component parameter. If a parameter value isn't provided, editors or build tools may display warnings to the user. This attribute is only valid on properties also marked with the `[Parameter]` attribute.
+Apply the `[EditorRequired]` attribute to specify a required component parameter. If a parameter value isn't provided, editors or build tools may display warnings to the user. This attribute is only valid on properties also marked with the `[Parameter]` attribute. The `[EditorRequired]` attribute is enforced at design-time and when the app is built. The attribute isn't enforced at runtime, and it doesn't guarantee a non-`null` parameter value.
 
 ```csharp
 [Parameter]