查看当前用户名下check的workspace：
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC>tf workspaces /owner:corp\123 /server:http://tctfs1:8081/tfs/thayers
unlock当前用户名下面的所有的workspace：
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC>tf workspace /delete nltc265;corp\123 /server:http://tctfs1:8081/tfs/thayers