Gets the name of a common field that is used to relate streamed features/rows with features/rows from a feature service accessible via 
GetRelatedFeatureServiceLayerURL.
            
            
            
            
            public string GetRelatedJoinField()
             
        
            
            Public Function GetRelatedJoinField() As String
             
        
             
        
            
            
            Return Value
            A name of the join field.
            
 
            
            
            
            
            Target Platforms: Windows 10, Windows 8.1