diff --git a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostFindAllReferencesEndpoint.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/FindAllReferences/CohostFindAllReferencesEndpoint.cs
similarity index 96%
rename from src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostFindAllReferencesEndpoint.cs
rename to src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/FindAllReferences/CohostFindAllReferencesEndpoint.cs
index 44c3800f945..0903272ee42 100644
--- a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostFindAllReferencesEndpoint.cs
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/FindAllReferences/CohostFindAllReferencesEndpoint.cs
@@ -8,6 +8,7 @@
 using Microsoft.AspNetCore.Razor;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.ExternalAccess.Razor.Cohost;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
 using Microsoft.CodeAnalysis.Razor.Remote;
 
 namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
@@ -16,7 +17,7 @@ namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 [Shared]
 [CohostEndpoint(Methods.TextDocumentReferencesName)]
 [Export(typeof(IDynamicRegistrationProvider))]
-[ExportCohostStatelessLspService(typeof(CohostFindAllReferencesEndpoint))]
+[ExportRazorStatelessLspService(typeof(CohostFindAllReferencesEndpoint))]
 [method: ImportingConstructor]
 #pragma warning restore RS0030 // Do not use banned APIs
 internal sealed class CohostFindAllReferencesEndpoint(
diff --git a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostDocumentFormattingEndpoint.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Formatting/CohostDocumentFormattingEndpoint.cs
similarity index 96%
rename from src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostDocumentFormattingEndpoint.cs
rename to src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Formatting/CohostDocumentFormattingEndpoint.cs
index 68067656011..2143bde024a 100644
--- a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostDocumentFormattingEndpoint.cs
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Formatting/CohostDocumentFormattingEndpoint.cs
@@ -10,6 +10,7 @@
 using Microsoft.AspNetCore.Razor;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.ExternalAccess.Razor.Cohost;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
 using Microsoft.CodeAnalysis.Razor.Formatting;
 using Microsoft.CodeAnalysis.Razor.Logging;
 using Microsoft.CodeAnalysis.Razor.Remote;
@@ -22,7 +23,7 @@ namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 [Shared]
 [CohostEndpoint(Methods.TextDocumentFormattingName)]
 [Export(typeof(IDynamicRegistrationProvider))]
-[ExportCohostStatelessLspService(typeof(CohostDocumentFormattingEndpoint))]
+[ExportRazorStatelessLspService(typeof(CohostDocumentFormattingEndpoint))]
 [method: ImportingConstructor]
 #pragma warning restore RS0030 // Do not use banned APIs
 internal sealed class CohostDocumentFormattingEndpoint(
@@ -88,7 +89,7 @@ public ImmutableArray<Registration> GetRegistrations(VSInternalClientCapabilitie
         {
             _logger.LogDebug($"Got a total of {remoteResult.Length} ranges back from OOP");
 
-            return remoteResult.Select(sourceText.GetTextEdit).ToArray();
+            return [.. remoteResult.Select(sourceText.GetTextEdit)];
         }
 
         return null;
diff --git a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostOnTypeFormattingEndpoint.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Formatting/CohostOnTypeFormattingEndpoint.cs
similarity index 97%
rename from src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostOnTypeFormattingEndpoint.cs
rename to src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Formatting/CohostOnTypeFormattingEndpoint.cs
index 16b6f5cc1b2..4c966304a04 100644
--- a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostOnTypeFormattingEndpoint.cs
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Formatting/CohostOnTypeFormattingEndpoint.cs
@@ -11,6 +11,7 @@
 using Microsoft.AspNetCore.Razor.LanguageServer.Hosting;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.ExternalAccess.Razor.Cohost;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
 using Microsoft.CodeAnalysis.Razor.Formatting;
 using Microsoft.CodeAnalysis.Razor.Logging;
 using Microsoft.CodeAnalysis.Razor.Remote;
@@ -23,7 +24,7 @@ namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 [Shared]
 [CohostEndpoint(Methods.TextDocumentOnTypeFormattingName)]
 [Export(typeof(IDynamicRegistrationProvider))]
-[ExportCohostStatelessLspService(typeof(CohostOnTypeFormattingEndpoint))]
+[ExportRazorStatelessLspService(typeof(CohostOnTypeFormattingEndpoint))]
 [method: ImportingConstructor]
 #pragma warning restore RS0030 // Do not use banned APIs
 internal sealed class CohostOnTypeFormattingEndpoint(
@@ -124,7 +125,7 @@ public ImmutableArray<Registration> GetRegistrations(VSInternalClientCapabilitie
         {
             _logger.LogDebug($"Got a total of {remoteResult.Length} ranges back from OOP");
 
-            return remoteResult.Select(sourceText.GetTextEdit).ToArray();
+            return [.. remoteResult.Select(sourceText.GetTextEdit)];
         }
 
         return null;
diff --git a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostRangeFormattingEndpoint.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Formatting/CohostRangeFormattingEndpoint.cs
similarity index 96%
rename from src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostRangeFormattingEndpoint.cs
rename to src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Formatting/CohostRangeFormattingEndpoint.cs
index 89597c10acd..378412d7db2 100644
--- a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostRangeFormattingEndpoint.cs
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Formatting/CohostRangeFormattingEndpoint.cs
@@ -10,6 +10,7 @@
 using Microsoft.AspNetCore.Razor;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.ExternalAccess.Razor.Cohost;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
 using Microsoft.CodeAnalysis.Razor.Formatting;
 using Microsoft.CodeAnalysis.Razor.Logging;
 using Microsoft.CodeAnalysis.Razor.Remote;
@@ -22,7 +23,7 @@ namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 [Shared]
 [CohostEndpoint(Methods.TextDocumentRangeFormattingName)]
 [Export(typeof(IDynamicRegistrationProvider))]
-[ExportCohostStatelessLspService(typeof(CohostRangeFormattingEndpoint))]
+[ExportRazorStatelessLspService(typeof(CohostRangeFormattingEndpoint))]
 [method: ImportingConstructor]
 #pragma warning restore RS0030 // Do not use banned APIs
 internal sealed class CohostRangeFormattingEndpoint(
@@ -96,7 +97,7 @@ public ImmutableArray<Registration> GetRegistrations(VSInternalClientCapabilitie
         {
             _logger.LogDebug($"Got a total of {remoteResult.Length} ranges back from OOP");
 
-            return remoteResult.Select(sourceText.GetTextEdit).ToArray();
+            return [.. remoteResult.Select(sourceText.GetTextEdit)];
         }
 
         return null;
diff --git a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostLinkedEditingRangeEndpoint.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/LinkedEditingRange/CohostLinkedEditingRangeEndpoint.cs
similarity index 93%
rename from src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostLinkedEditingRangeEndpoint.cs
rename to src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/LinkedEditingRange/CohostLinkedEditingRangeEndpoint.cs
index 813a052ab2c..5c10627e17e 100644
--- a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostLinkedEditingRangeEndpoint.cs
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/LinkedEditingRange/CohostLinkedEditingRangeEndpoint.cs
@@ -8,6 +8,7 @@
 using Microsoft.AspNetCore.Razor;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.ExternalAccess.Razor.Cohost;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
 using Microsoft.CodeAnalysis.Razor.LinkedEditingRange;
 using Microsoft.CodeAnalysis.Razor.Remote;
 using Microsoft.CodeAnalysis.Razor.Workspaces;
@@ -19,10 +20,10 @@ namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 [Shared]
 [CohostEndpoint(Methods.TextDocumentLinkedEditingRangeName)]
 [Export(typeof(IDynamicRegistrationProvider))]
-[ExportCohostStatelessLspService(typeof(CohostLinkedEditingRangeEndpoint))]
+[ExportRazorStatelessLspService(typeof(CohostLinkedEditingRangeEndpoint))]
 [method: ImportingConstructor]
 #pragma warning restore RS0030 // Do not use banned APIs
-internal class CohostLinkedEditingRangeEndpoint(IRemoteServiceInvoker remoteServiceInvoker)
+internal sealed class CohostLinkedEditingRangeEndpoint(IRemoteServiceInvoker remoteServiceInvoker)
     : AbstractRazorCohostDocumentRequestHandler<LinkedEditingRangeParams, LinkedEditingRanges?>, IDynamicRegistrationProvider
 {
     private readonly IRemoteServiceInvoker _remoteServiceInvoker = remoteServiceInvoker;
diff --git a/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Microsoft.CodeAnalysis.Razor.CohostingShared.projitems b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Microsoft.CodeAnalysis.Razor.CohostingShared.projitems
index bee52513a77..48a47c82ac9 100644
--- a/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Microsoft.CodeAnalysis.Razor.CohostingShared.projitems
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Microsoft.CodeAnalysis.Razor.CohostingShared.projitems
@@ -22,6 +22,15 @@
     <Compile Include="$(MSBuildThisFileDirectory)DocumentColor\CohostDocumentColorEndpoint.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)DocumentHighlight\CohostDocumentHighlightEndpoint.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)DocumentSymbol\CohostDocumentSymbolEndpoint.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Formatting\CohostDocumentFormattingEndpoint.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)FindAllReferences\CohostFindAllReferencesEndpoint.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Navigation\CohostGoToDefinitionEndpoint.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Navigation\CohostGoToImplementationEndpoint.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)LinkedEditingRange\CohostLinkedEditingRangeEndpoint.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Formatting\CohostOnTypeFormattingEndpoint.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Formatting\CohostRangeFormattingEndpoint.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Rename\CohostRenameEndpoint.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)SignatureHelp\CohostSignatureHelpEndpoint.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)FoldingRange\CohostFoldingRangeEndpoint.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Hover\CohostHoverEndpoint.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)HtmlDocumentServices\HtmlDocumentSynchronizer.cs" />
@@ -42,7 +51,4 @@
     <Compile Include="$(MSBuildThisFileDirectory)RazorLSPConstants.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)WellKnownStartupOrder.cs" />
   </ItemGroup>
-  <ItemGroup>
-    <Folder Include="$(MSBuildThisFileDirectory)SemanticTokens\" />
-  </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostGoToDefinitionEndpoint.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Navigation/CohostGoToDefinitionEndpoint.cs
similarity index 97%
rename from src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostGoToDefinitionEndpoint.cs
rename to src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Navigation/CohostGoToDefinitionEndpoint.cs
index beb891e0462..d750c87df27 100644
--- a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostGoToDefinitionEndpoint.cs
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Navigation/CohostGoToDefinitionEndpoint.cs
@@ -10,6 +10,7 @@
 using Microsoft.AspNetCore.Razor.PooledObjects;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.ExternalAccess.Razor.Cohost;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
 using Microsoft.CodeAnalysis.Razor.Remote;
 using Microsoft.CodeAnalysis.Razor.Workspaces;
 
@@ -19,7 +20,7 @@ namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 [Shared]
 [CohostEndpoint(Methods.TextDocumentDefinitionName)]
 [Export(typeof(IDynamicRegistrationProvider))]
-[ExportCohostStatelessLspService(typeof(CohostGoToDefinitionEndpoint))]
+[ExportRazorStatelessLspService(typeof(CohostGoToDefinitionEndpoint))]
 [method: ImportingConstructor]
 #pragma warning restore RS0030 // Do not use banned APIs
 internal sealed class CohostGoToDefinitionEndpoint(
diff --git a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostGoToImplementationEndpoint.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Navigation/CohostGoToImplementationEndpoint.cs
similarity index 97%
rename from src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostGoToImplementationEndpoint.cs
rename to src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Navigation/CohostGoToImplementationEndpoint.cs
index 4e6c97b1238..aac48aef424 100644
--- a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostGoToImplementationEndpoint.cs
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Navigation/CohostGoToImplementationEndpoint.cs
@@ -8,6 +8,7 @@
 using Microsoft.AspNetCore.Razor;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.ExternalAccess.Razor.Cohost;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
 using Microsoft.CodeAnalysis.Razor.Remote;
 using Microsoft.CodeAnalysis.Razor.Workspaces;
 
@@ -17,7 +18,7 @@ namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 [Shared]
 [CohostEndpoint(Methods.TextDocumentImplementationName)]
 [Export(typeof(IDynamicRegistrationProvider))]
-[ExportCohostStatelessLspService(typeof(CohostGoToImplementationEndpoint))]
+[ExportRazorStatelessLspService(typeof(CohostGoToImplementationEndpoint))]
 [method: ImportingConstructor]
 #pragma warning restore RS0030 // Do not use banned APIs
 internal sealed class CohostGoToImplementationEndpoint(
diff --git a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostRenameEndpoint.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Rename/CohostRenameEndpoint.cs
similarity index 96%
rename from src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostRenameEndpoint.cs
rename to src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Rename/CohostRenameEndpoint.cs
index 03d030cc455..04f72d1e914 100644
--- a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostRenameEndpoint.cs
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Rename/CohostRenameEndpoint.cs
@@ -8,6 +8,7 @@
 using Microsoft.AspNetCore.Razor;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.ExternalAccess.Razor.Cohost;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
 using Microsoft.CodeAnalysis.Razor.Remote;
 
 namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
@@ -16,7 +17,7 @@ namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 [Shared]
 [CohostEndpoint(Methods.TextDocumentRenameName)]
 [Export(typeof(IDynamicRegistrationProvider))]
-[ExportCohostStatelessLspService(typeof(CohostRenameEndpoint))]
+[ExportRazorStatelessLspService(typeof(CohostRenameEndpoint))]
 [method: ImportingConstructor]
 #pragma warning restore RS0030 // Do not use banned APIs
 internal sealed class CohostRenameEndpoint(
diff --git a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostSignatureHelpEndpoint.cs b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/SignatureHelp/CohostSignatureHelpEndpoint.cs
similarity index 97%
rename from src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostSignatureHelpEndpoint.cs
rename to src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/SignatureHelp/CohostSignatureHelpEndpoint.cs
index 05edf8ff394..a643e563229 100644
--- a/src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/Cohost/CohostSignatureHelpEndpoint.cs
+++ b/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/SignatureHelp/CohostSignatureHelpEndpoint.cs
@@ -9,6 +9,7 @@
 using Microsoft.AspNetCore.Razor.LanguageServer.Hosting;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.ExternalAccess.Razor.Cohost;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
 using Microsoft.CodeAnalysis.Razor.Remote;
 using Microsoft.CodeAnalysis.Razor.Workspaces.Settings;
 using Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
@@ -19,7 +20,7 @@ namespace Microsoft.VisualStudio.LanguageServices.Razor.LanguageClient.Cohost;
 [Shared]
 [CohostEndpoint(Methods.TextDocumentSignatureHelpName)]
 [Export(typeof(IDynamicRegistrationProvider))]
-[ExportCohostStatelessLspService(typeof(CohostSignatureHelpEndpoint))]
+[ExportRazorStatelessLspService(typeof(CohostSignatureHelpEndpoint))]
 [method: ImportingConstructor]
 #pragma warning restore RS0030 // Do not use banned APIs
 internal sealed class CohostSignatureHelpEndpoint(
diff --git a/src/Razor/src/Microsoft.VisualStudioCode.RazorExtension/Services/VSCodeFilePathService.cs b/src/Razor/src/Microsoft.VisualStudioCode.RazorExtension/Services/VSCodeFilePathService.cs
new file mode 100644
index 00000000000..501f8e1f3a1
--- /dev/null
+++ b/src/Razor/src/Microsoft.VisualStudioCode.RazorExtension/Services/VSCodeFilePathService.cs
@@ -0,0 +1,43 @@
+// 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.Composition;
+using Microsoft.CodeAnalysis.ExternalAccess.Razor;
+using Microsoft.CodeAnalysis.Razor.Workspaces;
+
+namespace Microsoft.CodeAnalysis.Remote.Razor;
+
+[Export(typeof(IFilePathService)), Shared]
+[method: ImportingConstructor]
+internal sealed class VSCodeFilePathService(LanguageServerFeatureOptions options) : AbstractFilePathService(options)
+{
+    private readonly LanguageServerFeatureOptions _options = options;
+
+    public override Uri GetRazorDocumentUri(Uri virtualDocumentUri)
+    {
+        if (_options.UseRazorCohostServer && IsVirtualCSharpFile(virtualDocumentUri))
+        {
+            throw new InvalidOperationException("Can not get a Razor document from a generated document Uri in cohosting");
+        }
+
+        if (virtualDocumentUri.Scheme == "razor-html")
+        {
+            var builder = new UriBuilder(virtualDocumentUri);
+            builder.Scheme = Uri.UriSchemeFile;
+            return base.GetRazorDocumentUri(builder.Uri);
+        }
+
+        return base.GetRazorDocumentUri(virtualDocumentUri);
+    }
+
+    public override bool IsVirtualCSharpFile(Uri uri)
+    {
+        if (_options.UseRazorCohostServer)
+        {
+            return RazorUri.IsGeneratedDocumentUri(uri);
+        }
+
+        return base.IsVirtualCSharpFile(uri);
+    }
+}