message: Prompt user to install Blazor WASM companion extension if needed
diff: @@ -240,6 +240,19 @@ async function isBlazorWebAssemblyProject(project: MSBuildProject): Promise<bool
  }
  function hasBlazorWebAssemblyDebugPrerequisites() {
  + const companionExtension = vscode.extensions.getExtension('ms-dotnettools.blazorwasm-companion');
  + if (!companionExtension) {
  + const msg = 'The Blazor WASM Debugging Extension is required to debug Blazor WASM apps in VS Code.';
  + vscode.window.showInformationMessage(msg, 'Install Extension', 'Close')
  + .then(async result => {
  + if (result === 'Install Extension') {
  + const uriToOpen = vscode.Uri.parse('vscode:extension/ms-dotnettools.blazorwasm-companion');
  + await vscode.commands.executeCommand('vscode.open', uriToOpen);
  + }
  + });
  + return false;
  + }
  +
  const debugJavaScriptConfigSection = vscode.workspace.getConfiguration('debug.javascript');
  const usePreviewValue = debugJavaScriptConfigSection.get('usePreview');
  if (usePreviewValue) {
  