What's the easiest way to look at Iinterfaces

Question

I recently started playing around with Ienumerable, Ienumerator, Iqueryable and Idisposable but still having troubles with implementations and understanding in general. How do I make my life easier and build a stable foundation on which I can expand later on?

Answer 1

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/interfaces/