This is a fork from issue 353, where a user is unable to disable the Git addin.
Opening a new bug to track this:
Also per your recommendation I did try disabling Git in the Add-in manager and
it created a new problem. This time I get a different exception when I open the
InvalidOperationException "Disabled add-ins can't be loaded."
And the the Solution Explorer is empty so I cannot actually do anything with
the solution or projects.
The solution is a solution that contains a git checkout.
This cannot be reproduced anymore so I believe it has been fixed. Please reopen if you can reproduce with a newer version of MonoDevelop