title: Adding existing .cs files to VS 2008 without VS 2008 copying the files to project
body: <p>How do I add existing C# files to a VS 2008 C# project without VS 2008 copying the files to the project folder?</p>
  
  <p>When adding existing C++ files to a C++ project, VS 2008 doesn't copy the files. It simply use the file paths.</p>