Wpf Core: Error message when adding an overlay on the map

[Frank4]

Thanks Steph,
No. You don’t have to add the map to the gird in code behind. What you are doing is correct with xaml . The point in the post is we can not just initialize the map by the simple two lines.

var FirstMap = new MapView();
FirstMap.Overlays?.Add(new LayerOverlay()); // Crash here

More detail is here

V12 NullReferenceException when adding to MapView

Hello, I have some code that seemed to work prior to the upgrade to V12 involving MapView. I am attempting to add an Overlay like this: FirstMap = new MapView(); FirstMap.Overlays?.Add(new LayerOverlay()); // Crash here I am getting a NullReferenceException everytime I try to .add to this list, I crash out with this exception: [crash] Is there something else I need to do now before adding to the Overlays list? Thanks, Matt

Sorry for the confuse. Back to your original issue. Could you send us the LayerService.cs file to us. We could look into more detail.

Thanks

Frank