How to: Switch Source Control Plug-ins
If you have installed more than one source control plug-in for Visual Studio, you can switch plug-ins at any time. Remember that projects controlled by one source control plug-in cannot be added to a solution managed by a different plug-in. Once you add a solution or project to source control using one plug-in, you cannot add the same item to source control using another plug-in, unless you first remove the item from source control.
To switch the default source control plug-in
In Visual Studio, on the Tools menu, click Options.
In the Options dialog box, click Source Control, then Plug-in Selection.
Select a plug-in and then click OK.