title: .csproj files not getting checked in to TFS
body: <p>My problem is that in my scenario, I have a project with two parallel project files for different build targets. I have a <em>ProjectName.WP8.csproj</em> and <em>ProjectName.WinRT.csproj</em>, which essentially include the same files.</p>
  
  <p>I am trying to check-in this solution (<em>SolutionName.WinRT.sln</em>) to TFS and I get no errors. All the code changes to the code in the project goes through, but when I check the actual state of TFS, the (newer) <em>PorjectName.WinRT.csproj</em> files are not checked in.</p>
  
  <p>This is quite peculiar since it worked perfectly for the WP8 version. How can I support this kind of scenario? </p>
  
  <p>(If it's not possible, how do I easily migrate my parallel project to another TFS project?)</p>