Sets the layer's minimum scale (representative fraction) at which the layer is visible in a 2D map view.
This method must be called on the MCT. Use QueuedTask.Run
This method or property must be called within the lambda passed to QueuedTask.Run.
Remarks
When you zoom out beyond minimum scale, the layer will not draw. For example, if you set minimum scale to 5,000,000, the layer will not draw when you zoom out beyond 1:5,000,000.