| Overload | Description | 
|---|---|
| Contains(SubscriptionToken) | Returns true if there is a subscriber matching SubscriptionToken. | 
| Contains(Func<TPayload,Task>) | Returns true if there is a subscriber matching | 
| Overload | Description | 
|---|---|
| Contains(SubscriptionToken) | Returns true if there is a subscriber matching SubscriptionToken. | 
| Contains(Func<TPayload,Task>) | Returns true if there is a subscriber matching | 
Target Platforms: Windows 11, Windows 10, Windows 8.1