Razor Intellisense Stopped Working in vscode

I am using vscode version:

Version: 1.56.2 (system setup)
Commit: 054a9295330880ed74ceaedda236253b4f39a335
Date: 2021-05-12T17:13:13.157Z
Electron: 12.0.4
Chrome: 89.0.4389.114
Node.js: 14.16.0
V8: 8.9.255.24-electron.0
OS: Windows_NT x64 10.0.19042

i was working on razor templates (*.cshtml files). and it was working fine since three days ago.

Is there anyone who is facing the same issue or know how to resolve it please let me know.

Thanks in advance.