This section of Geoff Does Stuff is all about software development with .NET but before you ask, this is not a comprehensive introduction, tutorial, or documentation. My aim is simple, make some notes about the stuff I learn. It will help me remember and it might help someone else!
If you suspect your .NET Framework is not working properly or is corrupt, then see .NET Issues for some suggestions.
It is worth noting Microsoft's explanation of .NET Core, which as of December 2014 is an indication of where things are heading, so read Introducing .NET Core - .NET Blog - Site Home - MSDN Blogs for details.
A good starting point for .NET work is What .NET Developers ought to know to start in 2017 - Scott Hanselman.