private static void UpdateZoneType(IElementZone elementZone, XZone zone)
		{
			elementZone.SetZLayer(zone == null ? 50 : 60);
			elementZone.BackgroundColor = zone == null ? System.Windows.Media.Colors.Black : System.Windows.Media.Colors.Green;
		}
		private static void UpdateZoneType(IElementZone elementZone, Zone zone)
		{
			elementZone.BackgroundColor = System.Windows.Media.Colors.Black;
			elementZone.SetZLayer(20);
			if (zone != null)
				switch (zone.ZoneType)
				{
					case ZoneType.Fire:
						elementZone.BackgroundColor = System.Windows.Media.Colors.Green;
						elementZone.SetZLayer(30);
						break;
					case ZoneType.Guard:
						elementZone.BackgroundColor = System.Windows.Media.Colors.Brown;
						elementZone.SetZLayer(40);
						break;
				}
		}