I have managed to corrupt my local Visual Studio Team Foundation Server workspace mappings. Visual Studio can successfully connect to TFS and I can manage the TFS Server co
I've fixed my issue where Visual Studio was unable to open Source Control Explorer and Workspaces/Manage Workspaces dialogue by deleting the cache folder located here at:
%localappdata%\Microsoft\Team Foundation\5.0\Cache
Once this folder was deleted reopening Visual Studio was able to connect to Source Control Explorer and I can once again manage my workspaces from the IDE. (Visual Studio created a new cache folder in the same location after starting)