Protected Overridable MustOverride Sub UpdateUI( _
   ByVal currentStreamNumber As Integer, _
   ByVal state As TServiceState, _
   ByVal streamedData As TStreamedData _
) 

Dim instance As ServiceStreamer(Of TStreamedData,TServiceState)
Dim currentStreamNumber As Integer
Dim state As TServiceState
Dim streamedData As TStreamedData
 
instance.UpdateUI(currentStreamNumber, state, streamedData)

protected virtual abstract void UpdateUI( 
   int currentStreamNumber,
   TServiceState state,
   TStreamedData streamedData
)

protected:
virtual abstract void UpdateUI( 
   int currentStreamNumber,
   TServiceState state,
   TStreamedData streamedData
)