ActivitySource.HasListeners Method   
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Checks if there are any listeners for this activity source.
public:
 bool HasListeners();public bool HasListeners();member this.HasListeners : unit -> boolPublic Function HasListeners () As BooleanReturns
true if there is a listener registered for this activity source; otherwise, false.