TileSource Constructor (String, Int32, Int32)
Assembly: Microsoft.Phone.Maps (in Microsoft.Phone.Maps.dll)
Valid values for the zoom level are 1 through 20.
If you specify a value that is less than 1 for minZoomLevel, the value is changed to 1.
If you specify a value that is greater than 20 for maxZoomLevel, the value is changed to 20.
If you specify a larger value for minZoomLevel than for maxZoomLevel, an exception occurs.