If like me you’ve written code that makes use of Microsoft.TeamFoundation.Framework.Server you may also have made use of Microsoft.TeamFoundation.Framework.Server.TeamFoundationApplication. This is the class that contains the TFS Logging method.
If you’ve recently ported your applications over to TFS 2012 or have updated your TFS to Update 1 you may have got the following error.
Could not load type 'Microsoft.TeamFoundation.Framework.Server.TeamFoundationApplication' from assembly 'Microsoft.TeamFoundation.Framework.Server
It appears Microsoft have changed the name of the class from Microsoft.TeamFoundation.Framework.Server.TeamFoundationApplication to Microsoft.TeamFoundation.Framework.Server.TeamFoundationApplicationCore
You’ll have to change your code to reference the renamed code in order for it to work again. I hope this helps someone.