Object type definitions, interface type definitions, and value type definitions can include member definitions. Field definitions define the representation of values of the type by specifying the substructure of the value. Method definitions define operations on values of the type and operations on the type itself (static methods). Property and event definitions shall only be defined on object types. Properties and events define named groups of accessor method definitions that implement the named event or property behavior. Nested type declarations define types whose names are scoped by the enclosing type and whose instances have full access to all members of the enclosing class.
Depending on the kind of type definition, there are restrictions on the member definitions allowed.