Unsubscribes the receiver from getting messages with the specified messageId from the specified senderType
| C# | Visual Basic | Visual C++ |
If the receiver has been subscribed to any of the specified messageId and senderType the function returns true. Otherwise it returns false.
| Exception | Condition |
|---|---|
| ArgumentNullException | Thrown if the receiver or the senderType is null. |
| ArgumentException | Thrown if the receiver is not INotificationReceiver. |