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Introduction to C# classes. In lots of programming tutorials, information about classes will be saved for much later. However, since C# is all about Object Oriented programming and thereby classes, we will make a basic introduction to the most important stuff already now. First of all, a class is a group of related methods and variables.
An abstract class is denoted in Visual Basic by the keyword MustInherit. In C#, the abstract modifier is used. Any methods that are meant to be invariant may be coded into the base class, but any methods that are to be implemented are marked in Visual Basic with the MustOverride modifier.