Generics is a very important topic in the C# programming language. As far as I know, it would be hard to find any modern software written in C# that doesn't use generics.  

The topics we will cover in this chapter are as follows:

• What are Generics?
• Why do we need Generics?
• Different constraints of Generics
• Generic methods
• Covariance and Contravariance in Generics