title: MonoDevelop Error: Unknown MSBuild failure. Please try building the project again
body: <p>Just installed MonoDevelop and I tried to compile a simple "Hello World".
  Code I used:</p>
  
  <pre><code>using System;
  
  public class HelloWorld
  {
      static public void Main ()
      {
          Console.WriteLine ("Hello Mono World");
      }
  }
  </code></pre>
  
  <p>The error that I get is :</p>
  
  <pre><code>EmptyCSharpFile.csproj(1,1): Error: Unknown MSBuild failure. Please try building the project again (EmptyCSharpFile)
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/GIhwa.png" rel="noreferrer"><img src="https://i.stack.imgur.com/GIhwa.png" alt="Error Message"></a></p>
  
  <p>My system info:
  Ubuntu 16.04 LTS , updated
  The MonoDevelop and mono are freshly installed.
  Mono JIT compiler version 5.0.1.1
  MonoDevelop Version 5.10
  I can use mcs and run it but can't use monodevelop to run it.
  I did read these similar topics but no response yet:
  <a href="https://stackoverflow.com/questions/36980702/monodevelop-failure-unknown-msbuild-failure-on-linux">MonoDevelop Failure &quot;Unknown MSBuild Failure&quot; on Linux</a> ;
  <a href="https://stackoverflow.com/questions/37178514/c-sharp-compile-unknown-msbuild-error-monodevelop-linux">C# compile Unknown MSBuild error MonoDevelop Linux</a> ; <a href="https://askubuntu.com/questions/73630/could-not-obtain-c-compiler-error-when-using-monodevelop">https://askubuntu.com/questions/73630/could-not-obtain-c-compiler-error-when-using-monodevelop</a></p>