.NET Framework 4.6 and 4.5
The AsyncStateMachineAttribute type exposes the following members.
|StateMachineType||Returns the type object for the underlying state machine type that was generated by the compiler to implement the state machine method. (Inherited from StateMachineAttribute.)|
|TypeId||When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)|