Types can declare locations that are associated with the type rather than any particular value of the type. Such locations are static fields of the type. As such, static fields declare a location that is shared by all values of the type. Just like non-static (instance) fields, a static field is typed and that type never changes. Static fields are always restricted to a single application domain basis (see §I.12.5), but they can also be allocated on a per-thread basis.
Similarly, types can also declare methods that are associated with the type rather than with values of the type. Such methods are static methods of the type. Since an invocation of a static method does not have an associated value on which the static method operates, there is no this pointer available within a static method.