diff --git a/src/Microsoft.AspNetCore.Blazor/Components/ComponentResolver.cs b/src/Microsoft.AspNetCore.Blazor/Components/ComponentResolver.cs
index 41efd48bbf..ff93d033de 100644
--- a/src/Microsoft.AspNetCore.Blazor/Components/ComponentResolver.cs
+++ b/src/Microsoft.AspNetCore.Blazor/Components/ComponentResolver.cs
@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
@@ -11,7 +11,7 @@ namespace Microsoft.AspNetCore.Blazor.Components
     /// <summary>
     /// Resolves components for an application.
     /// </summary>
-    internal class ComponentResolver
+    internal static class ComponentResolver
     {
         /// <summary>
         /// Lists all the types 
diff --git a/src/Microsoft.AspNetCore.Blazor/Rendering/RenderQueueEntry.cs b/src/Microsoft.AspNetCore.Blazor/Rendering/RenderQueueEntry.cs
index 565f1466d4..3b83254838 100644
--- a/src/Microsoft.AspNetCore.Blazor/Rendering/RenderQueueEntry.cs
+++ b/src/Microsoft.AspNetCore.Blazor/Rendering/RenderQueueEntry.cs
@@ -1,7 +1,6 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
-using Microsoft.AspNetCore.Blazor.RenderTree;
 using System;
 
 namespace Microsoft.AspNetCore.Blazor.Rendering
diff --git a/src/Microsoft.AspNetCore.Blazor/Rendering/Renderer.cs b/src/Microsoft.AspNetCore.Blazor/Rendering/Renderer.cs
index 8107870561..716e683271 100644
--- a/src/Microsoft.AspNetCore.Blazor/Rendering/Renderer.cs
+++ b/src/Microsoft.AspNetCore.Blazor/Rendering/Renderer.cs
@@ -1,11 +1,10 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using Microsoft.AspNetCore.Blazor.Components;
 using Microsoft.AspNetCore.Blazor.RenderTree;
 using System;
 using System.Collections.Generic;
-using System.Threading.Tasks;
 
 namespace Microsoft.AspNetCore.Blazor.Rendering
 {