I have noticed that if I add an ArcGISLocalTileLayer from a different spatial reference than the other layers in the map, I don't get an on the fly reprojection. This is fine, but I need a way to detect the conflict. How can I determine the spatial reference of this type of layer. I see a DefaultSpatialReference property that looked promising, but it is null after the layer is initialized. The layer adds to the map without any error or indication of this issue. I need a way to detect this so that I can notify the user.