title: deleted csproj File by mistake
body: <p>I mistakenly deleted the csproj File in my project, and now I'm getting an error message :
  <a href="https://i.stack.imgur.com/XDOrW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XDOrW.png" alt="enter image description here"></a>
  now I don't know how can I restore it or make a new one, I couldn't find any file with csproj suffix in template files associating with this project file.</p>