public DisplayUnitFormat GetElevationUnitFormat()

//var map = MapView.Active.Map;
//Must be on the QueuedTask.Run()

//If the map is not a scene, the default Project distance
//unit will be returned
var elev_unit = map.GetElevationUnitFormat();
var line = $"{elev_unit.DisplayName}, {elev_unit.UnitCode}";
System.Diagnostics.Debug.WriteLine(line);

var mv = MapView.Active;
var map = mv.Map;

QueuedTask.Run(() =>
{
  //Get the current elevation unit. If the map is not
  //a scene the default Project distance unit is returned
  var elev_unit = map.GetElevationUnitFormat();

  //Format the view camera elevation
  var str = elev_unit.FormatValue(mv.Camera.Z);

  System.Diagnostics.Debug.WriteLine($"Formatted elevation: {str}");
});