Protected Function GetPropertyValue(Of V)( _
   ByVal propertyName As String, _
   ByVal nullValue As V _
) As V

Dim instance As DockExtender
Dim propertyName As String
Dim nullValue As V
Dim value As V
 
value = instance.GetPropertyValue(Of V)(propertyName, nullValue)

protected V GetPropertyValue<V>( 
   string propertyName,
   V nullValue
)