title: How do I compile C# compatible with win server 2003 under VS12 (xxxx.exe is not a valid win32 application)
body: <p>I have a C# project in VS12/WIN7 but when I try to run it under windows server 2003, it throws an error that it's not a valid WIN32 application. I have tried many configuration, also changed to Any Cpu from Configuration Manager, but it won't work.
  This project has some socket and threading code...
  How do I fix it ?</p>