Variables

The static fields of a type (class or struct) exist independently of any instance of the type and are stored in a special area of the heap.

Static fields are created when the type is first loaded and continue to exist until the application ends.

This applies regardless of how many instances (if any) of the type have been created or disposed of, whether the containing class is sealed or any other consideration.

Any fields of a static class must be static (it cannot contain any instance members) and are dealt with in the same way as the static fields of an ordinary class.