C# Edit and Continue: error 4043
The C# compiler failed to compile the project for Edit and Continue. Check for compilation errors
The code changes Edit and Continue tried to compile contain errors that prevent the debug session from continuing.
To correct this error
Check for errors by looking at the error list, and fix any problems you see there.
If no errors appear in the error list, this error is probably due to an internal compiler problem. On the Debug menu, click Stop Debugging, then make the changes and start a new debugging session.