Attached is my tfignore file and is very helpful when checkin.

First thing is that Test Studio needs to create a tfignore if the project has any items that are undesired to go into TFS.  

Backup, bin, obj, Profile Configuration, Results (for large project), and the Page.g.cs file (when dealing with checkin and getting latest, page.g.cs goes to read only and allow Test Studio to regenerate the page.g.cs file from the tests).

The next thing is when a project is getting checked against the TFS, Test Studio should observe the ignored items from the tfignore file.  

[05/01 12:18:59,Telerik.TestStudio.exe(3452:1),TeamFoundationServer] TFSServer._vcs_NonFatalError() : Non-fatal error handling TFS request: C:\Users\ewin.hong\Desktop\Automation13\MyCAA Web Tests\Backup\2013.1.1030.0\MYCAA Web Tests.v11.suo: No file matches.