Microsoft's Plans for the Future of .NET 

Many many years ago I wrote a blog post about what .NET Developers ought to know. Unfortunately what was just a list of questions was abused by recruiters and others who used it as a harsh litmus test.  

The referencesource repository contains sources from Microsoft .NET Reference Source that represent a subset of the .NET Framework. This subset contains similar functionality to the class libraries that are being developed in .NET Core. We intend to consult the referencesource repository as we develop .NET Core. It is also for the community to leverage to enable more scenarios for .NET developers. 

Research papers in the .NET source 

...Here, you will learn about the selection of .NET edition for your projects

Unhandled exceptions are a bit of a misnomer. In .NET, every exception is handled. By the time you access the specifics of an error in your Try-Catch block, the Framework has already analyzed the problem, built a structure to contain its details, examined the stack trace, and used reflection to pinpoint the location of the error, among other mundane tasks. In short, when errors occur, .NET serves them up to your code in a neatly packaged, highly examinable data block.

Fastest C# Serializer and Infinitely Fast Deserializer for .NET, .NET Core and Unity.