Clean up csproj files

From @davidfowl

Clean up all of the extraneous content, the extra content globs etc.

I'm interested in working on this issue. May I be assigned to this task?

[12:24 PM] Niharika Sai Duggi Hi there, I'm interested in working on issue , I've looked into the details and I'm ready to contribute, as a part of my university's requirement to contribute to open source project. If there are any specific guidelines or additional information I should know about, please assign this to me. Thanks for the opportunity to contribute!