WIP

Author: Andrew Hall

src/lsptoolshost/server/roslynLanguageServer.ts

@@ -615,6 +615,13 @@ export class RoslynLanguageServer {
             path.join(razorPath, 'Targets', 'Microsoft.NET.Sdk.Razor.DesignTime.targets')
         );
 
+        const razorExtensionPath =
+            razorOptions.razorExtensionPath === ''
+                ? path.join(context.extension.extensionPath, '.razorExtension')
+                : razorOptions.razorExtensionPath;
+
+        additionalExtensionPaths.push(path.join(razorExtensionPath, 'Microsoft.VisualStudioCode.RazorExtension.dll'));
+
         // Get the brokered service pipe name from C# Dev Kit (if installed).
         // We explicitly call this in the LSP server start action instead of awaiting it
         // in our activation because C# Dev Kit depends on C# activation completing.

src/shared/options.ts

@@ -88,6 +88,9 @@ export interface RazorOptions {
     readonly razorDevMode: boolean;
     readonly razorPluginPath: string;
     readonly razorServerPath: string;
+
+    // Folder that contains Microsoft.VisualStudioCode.RazorExtension.dll
+    readonly razorExtensionPath: string;
 }
 
 class CommonOptionsImpl implements CommonOptions {
@@ -430,6 +433,9 @@ class RazorOptionsImpl implements RazorOptions {
     public get razorServerPath() {
         return readOption<string>('razor.languageServer.directory', '');
     }
+    public get razorExtensionPath() {
+        return readOption<string>('razor.extension.path', '');
+    }
 }
 
 export const commonOptions: CommonOptions = new CommonOptionsImpl();