Yes, the fragmentation at the .net framework level is just incredible. Especially as Microsoft own the entire platform -- they've inflicted this problem on them

Yes, the fragmentation at the .net framework level is just incredible. Especially as Microsoft own the entire platform -- they've inflicted this problem on themselves! It seems like every couple of years they decide to try to carve out a common subset of all the different frameworks, and have that be the real Core Standard Portable .Net Framework, but it never quite catches on and they end up with just yet another variant to support. The languages are great (both C# and F#), the runtime is great, the compiler and debugger are great, but the SDK versioning is a total mess and the package manager (NuGet) is pretty bad too. (Sounds like this book covers the bits that are great)