Refer to this community sample.
arcgis-pro-sdk-community-samples/Geometry/CoordinateSystemDialog at master · Esri/arcgis-pro-sdk-community-samples · Git…
When I changed the current z coord system into <None> value, SelectedSpatialReferenceChanged event does not fire up. If other coord is selected rather than <None> or null value, that event is fired.
Would like to check how to capture that change event.
CoordSysDialog.xml.cs
this.CoordinateSystemsControl.SelectedSpatialReferenceChanged += (s, args) => {
_vm.SelectedSpatialReference = args.SpatialReference;
};