diff --git a/Directory.Packages.props b/Directory.Packages.props
index 19c6deb856d..02c9a790a75 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -63,7 +63,6 @@
     <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="$(_MicrosoftExtensionsPackageVersion)" />
     <PackageVersion Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="$(_MicrosoftExtensionsPackageVersion)" />
     <PackageVersion Include="Microsoft.Extensions.FileSystemGlobbing" Version="$(_MicrosoftExtensionsPackageVersion)" />
-    <PackageVersion Include="Microsoft.Extensions.NonCapturingTimer.Sources" Version="5.0.0-preview.4.20205.1" />
     <PackageVersion Include="Microsoft.Extensions.Logging" Version="$(_MicrosoftExtensionsPackageVersion)" />
     <PackageVersion Include="Microsoft.Extensions.ObjectPool" Version="$(MicrosoftExtensionsObjectPoolPackageVersion)" />
     <PackageVersion Include="Microsoft.Internal.VisualStudio.Shell.Framework" Version="$(_MicrosoftVisualStudioShellPackagesVersion)" />
diff --git a/NuGet.config b/NuGet.config
index 7a818f5f188..b5e83791aff 100644
--- a/NuGet.config
+++ b/NuGet.config
@@ -67,7 +67,6 @@
     </packageSource>
     <packageSource key="dotnet6-transport">
       <package pattern="microsoft.net.sdk.razor" />
-      <package pattern="microsoft.extensions.noncapturingtimer.sources" />
     </packageSource>
     <packageSource key="dotnet8">
       <package pattern="microsoft.*" />
diff --git a/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Extensions/IRazorGeneratedDocumentExtensions.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Extensions/IRazorGeneratedDocumentExtensions.cs
index 214efe87b4d..e86c686c056 100644
--- a/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Extensions/IRazorGeneratedDocumentExtensions.cs
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Extensions/IRazorGeneratedDocumentExtensions.cs
@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the MIT license. See License.txt in the project root for license information.
+
+using System;
 using Microsoft.CodeAnalysis.Text;
 
 namespace Microsoft.AspNetCore.Razor.Language;
diff --git a/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Microsoft.CodeAnalysis.Razor.Workspaces.csproj b/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Microsoft.CodeAnalysis.Razor.Workspaces.csproj
index dd983e0656d..d74202c9306 100644
--- a/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Microsoft.CodeAnalysis.Razor.Workspaces.csproj
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Microsoft.CodeAnalysis.Razor.Workspaces.csproj
@@ -7,18 +7,12 @@
     <IsShippingPackage>false</IsShippingPackage>
     <ExcludeFromSourceOnlyBuild>true</ExcludeFromSourceOnlyBuild>
     <IsPackable Condition="'$(OS)' != 'Windows_NT'">false</IsPackable>
-    <!--
-      The NonCapturingTimer package is a source package, and the source files in there don't conform to our header
-      poilcy, so we have to ignore that error code for this project.
-    -->
-    <NoWarn>$(NoWarn);IDE0073</NoWarn>
   </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" />
     <PackageReference Include="Microsoft.CodeAnalysis.ExternalAccess.Razor" />
     <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.Common" />
-    <PackageReference Include="Microsoft.Extensions.NonCapturingTimer.Sources" PrivateAssets="all" />
     <PackageReference Include="Microsoft.VisualStudio.LanguageServer.Protocol" />
     <PackageReference Include="Microsoft.VisualStudio.LanguageServer.Protocol.Extensions" />
     <PackageReference Include="Microsoft.VisualStudio.LanguageServer.Protocol.Internal" />
diff --git a/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/NonCapturingTimer.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/NonCapturingTimer.cs
new file mode 100644
index 00000000000..23bb7a90127
--- /dev/null
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/NonCapturingTimer.cs
@@ -0,0 +1,44 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the MIT license. See License.txt in the project root for license information.
+
+// https://github.com/dotnet/runtime/blob/11c86d8acba2f248b3afb5e8594f5f41ceebf098/src/libraries/Common/src/Extensions/NonCapturingTimer/NonCapturingTimer.cs
+
+using System;
+using System.Threading;
+
+namespace Microsoft.Extensions.Internal;
+
+// A convenience API for interacting with System.Threading.Timer in a way
+// that doesn't capture the ExecutionContext. We should be using this (or equivalent)
+// everywhere we use timers to avoid rooting any values stored in asynclocals.
+internal static class NonCapturingTimer
+{
+    public static Timer Create(TimerCallback callback, object state, TimeSpan dueTime, TimeSpan period)
+    {
+        if (callback is null)
+        {
+            throw new ArgumentNullException(nameof(callback));
+        }
+
+        // Don't capture the current ExecutionContext and its AsyncLocals onto the timer
+        var restoreFlow = false;
+        try
+        {
+            if (!ExecutionContext.IsFlowSuppressed())
+            {
+                ExecutionContext.SuppressFlow();
+                restoreFlow = true;
+            }
+
+            return new Timer(callback, state, dueTime, period);
+        }
+        finally
+        {
+            // Restore the current ExecutionContext
+            if (restoreFlow)
+            {
+                ExecutionContext.RestoreFlow();
+            }
+        }
+    }
+}
diff --git a/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Remote/RemoteAutoInsertOptions.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Remote/RemoteAutoInsertOptions.cs
index 75455fd0a2c..2ef7a3224d5 100644
--- a/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Remote/RemoteAutoInsertOptions.cs
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Remote/RemoteAutoInsertOptions.cs
@@ -1,4 +1,7 @@
-using System.Runtime.Serialization;
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the MIT license. See License.txt in the project root for license information.
+
+using System.Runtime.Serialization;
 using Microsoft.CodeAnalysis.Razor.Formatting;
 using Microsoft.CodeAnalysis.Razor.Settings;
 
diff --git a/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/TextDifferencing/TextDiffer.IntArray.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/TextDifferencing/TextDiffer.IntArray.cs
index ba51627d53c..120685d419f 100644
--- a/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/TextDifferencing/TextDiffer.IntArray.cs
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/TextDifferencing/TextDiffer.IntArray.cs
@@ -1,4 +1,5 @@
-// Licensed under the MIT license. See License.txt in the project root for license information.
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the MIT license. See License.txt in the project root for license information.
 
 using System;
 using System.Buffers;