I installed visual studio 2010 RC, after uninstalling 2010 Beta 2 version.
When activated Visual Studio, got error message “Team Foundation Error. Could not load type ‘Microsoft.TeamFoundation.Client.TeamFoundationServerBase’ from assembly ”Microsoft.TeamFoundation.Client, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f57f11d50a3a’.”
There’s a great post, by Grant Holliday, explaining the reason: TFS Object Model API changes after Beta 2.
The bottom line: Uninstalling VS2010 Beta 2 is not enough, we have to remove all VS add-ons which were built against the Beta2 object model.
I had 2 add-ons that caused those errors:
1. TFS 2010 power tools Beta 2 (According to Brian Harry, RC compatible version is a matter of days to be released)
2. Team Foundation Sidekicks 2010 by Attrice.
Note: If you try to uninstall Power Tools *After* installing VS2010 RC, It’s possible that the uninstall will not complete successfuly, and you will still get error messages in VS2010. Buck Hodges provides a fix for that, by re-installing and uninstalling Power Tools.