libgit2/libgit2sharp — pull request #473 by dahlbyk (2013-07-22 22:14:20+00:00)
Title: Non-extensible Sealed

It occurs to me that our explicit list of types excepted from the virtual member rule could be eliminated by just marking such types as `sealed` instead. The only type for which this might be debated is `Repository`, but my thought is that any reason to subclass it could be handled by a proxy that implements `IRepository`.

Also, an `[Obsolete]` purge.