Static Constructors - CSharp Custom Type

Introduction

A static constructor executes once per type, rather than once per instance.

A type can define only one static constructor, and it must be parameterless and have the same name as the type:

class Test
{
  static Test() { Console.WriteLine ("Type Initialized"); }
}

The runtime automatically invokes a static constructor just prior to the type being used.

Two things trigger this:

The only modifiers allowed by static constructors are unsafe and extern.