From 237a7a65d6432e0ac99537e73f745603cb9ad867 Mon Sep 17 00:00:00 2001
From: NTaylorMullen <nimullen@microsoft.com>
Date: Wed, 16 Jan 2019 13:59:49 -0800
Subject: [PATCH] Seal RestrictChildrenAttribute.

Addresses #5041
---
 src/Razor/Razor/src/TagHelpers/RestrictChildrenAttribute.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Razor/Razor/src/TagHelpers/RestrictChildrenAttribute.cs b/src/Razor/Razor/src/TagHelpers/RestrictChildrenAttribute.cs
index bc4f6bac35..2c5652af8d 100644
--- a/src/Razor/Razor/src/TagHelpers/RestrictChildrenAttribute.cs
+++ b/src/Razor/Razor/src/TagHelpers/RestrictChildrenAttribute.cs
@@ -13,7 +13,7 @@ namespace Microsoft.AspNetCore.Razor.TagHelpers
     /// <see cref="HtmlTargetElementAttribute.TagStructure"/> as <see cref="TagStructure.WithoutEndTag"/> will result
     /// in this attribute being ignored.</remarks>
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
-    public class RestrictChildrenAttribute : Attribute
+    public sealed class RestrictChildrenAttribute : Attribute
     {
         /// <summary>
         /// Instantiates a new instance of the <see cref="RestrictChildrenAttribute"/> class.