Understand the differences between a singleton class and a static class and when to use which in your applications.

When working with TypeScript it's not unusual to need a class that matches an already existing server-side class written in C#. Here's one way to get from C# to TypeScript by doing what you normally ...

Is there a C# equivalent to friend classes as in C++ or Java? All I can find are friend assemblies, which isn't quite what I am looking for.