In my coming job I will do most of the development in C#. Therefore I am currently practicing writing stuff in C# using Visual Studio. If you, as I do, know a bit of Java, some C, and some C++ you can get started very quickly (I actually did pass the recruitment coding test, that I had to do in C#). But I do not aim to be on a "getting started" level for very long. Any tips on advanced C# topics that are good to learn are appreciated.