C# is a programming language that is often used in the Microsoft world. It's used to make Windows apps and for Windows mobile.
If you have to learn C# for work or study, these are some resources to get started.
There are some websites that give an introduction to C#.
List of online tutorials on C# programming:
Courses are great to progress faster on programming. If you like to learn by massive online courses (mooc), these are some good ones: