Visual Studio locks output file on build

Question

I have a simple WinForms solution in VS 2010. Whenever I build it, output file (bin\\debug\\app.exe) ends up locked, and subsequent builds fail with a message like \"

Answer 1

If your $(TargetPath) points to a DLL that uses COM ensure you have a default constructor. Not sure why the default constructor is not inferred there. Adding the default constructor worked for me in this scenario.