The following error occurred while using Vs2013 to open the Vs2008 solution: cannot open because this version of the application does not support its project type (. csproj).
Find a solution on the network: command line or vs comes with Command prompt input: devenv.exe/resetskippkgs But I still can't .
Then open the Vs2013 yourself and then in the Vs2013: File->open Project Open Solution The following prompt message appears: means the following solutions and projects need to be upgraded, no problem click "OK" on it After the upgrade is complete and no errors occur, you can work in the Vs2013.
Reference:
Because this version of the application does not support its project type (. csproj). VS2013 Open Project Prompt This version of the application does not support its project type (. csproj)
From for notes (Wiz)
The following error occurred while using Vs2013 to open the Vs2008 solution: This version of the application does not support its project type (. csproj)
