How to determine source controlled solution workspace in Visual Studio

When you have several solutions in different workspaces, it is not always easy to remember what workspace you work with (say, you load the solution into Visual Studio from file system), but right workspace you need to specify when performing operations such as branch, that are not supported from the Visual Studio Solution Explorer, but rather from the TFS Source Control Explorer.

The answer is short - when you load the solution and open the Pending Changes window, the workspace selected by default is the one the solution is associated with.

When you change the workspace though, your selection will be remembered until solution is reloaded.

Thanks to Richard Berg for the answer.