In this article, we will see the details regarding constraints on type parameters at method definition.

As the name indicates, extension methods is the mechanism to add (or extend) methods to existing types without having to inherit or recompile the assembly/project where the type resides.

The ref and out keywords are often used to change the behavior of parameters in a method. However, there’s a keyword that is much less known, but which is quite helpful: params. When using params, before any parameter declaration, it will allow us to provide a variable number of arguments when calling the method. The parameter using the params keyword contains the restriction that it has to be declared as an array.