This is Tfs Go Offline extension version for Visual Studio 2012.
For more information see another version description.
Go offline command for Team Foundation Server and Visual Studio 2012.
You can find new menu item in TEAM menu as "Go Offline", also in context menu of Solution Explorer. When executed, it switches current solution and all projects to Offline mode and you can work without acces to your Team Foundation Server.
Tested only on TFS 2010, but from VS2012.
Based on GoOffline extension with permission of It's author Bernhard Tschirren.