Gets the exception related to the state change or null. If an exception is present, it may be used to distinguish reasons for state transitions. A value of null does not necessarily indicate success.

Gets whether the results of the state change will also be reported directly to the application due to a method call. For example, an exception encountered by calling Invite would be reported both where Invite was called, and in the state change. An application written to handle errors when it makes method calls should only need to handle results reported in the state change only (IsMethodResult==false).

Gets the specific response data in the Notify that was used to map to the new State.

The remaining text in the notification body after status code and status text. If the state change is not due to Notification received or the notification did not contain it, this can be String.Empty.

Status code parsed from notification body. If the value is 0, then it indicates that there is no status code available.

Status text parsed from notification body. If the state change is not due to Notification received, this can be String.Empty.

Gets the previous state for the object.

Gets the new state for the object.