Static constructors are introduced with C# to initialize the static data of a class. CLR calls the static constructor before the first instance is created.
The static constructor has the following features:
- No access specifier is required to define it.
- You cannot pass parameters in static constructor.
- A class can have only one static constructor.
- It can access only static members of the class.
- It is invoked only once, when the program execution begins.