Why does Visual Studio 2012 keep adding "Debug" and "Release" solution configurations even after I delete them?

Question

I have multiple custom solution configurations such as: CodeAnalysis, DEV-Debug, DEV-Release, TEST-Debug, TEST-Release, PROD-Release.

I have deleted the default solution configurations of "Debug" and "Release" dozens of times yet they constantly re-appear. Has anyone experience this before and, if so, were you able to prevent this from occuring?

Answer 1

I solved this problem by opening the .sln file in a text editor and deleting the offending solution configurations.