I am using Visual Studio Ultimate which come with TFS. However I am using Visual SVN as my source control.
I have installed VisualSVN server and the Visual Studio plug in.
What should I do to switch from TFS to Visual SVN.
When I go do Tools/Options/Source Control/Plug-in selection, I have the choice between "None" and TFS.
If you're not stuck on VisualSVN, try AnkhSVN. We use that here, and had no issues in getting it to work with VisualStudio 2010.
AnkhSVN is an open source plugin, so there's no need to pay for a license.
If VisualSVN is like AnkhSVN, you need to in tall VisualStudio first, then AnkhSVN. Then go into VisualStudio and select SVN in the Source Control Plug-in selection.