Server
if (!Page.IsPostBack)
{
Map1.MapBackground.BackgroundBrush = new GeoSolidBrush(GeoColor.FromHtml("#E5E3DF"));
Map1.CurrentExtent = new RectangleShape(-13939426.6371, 6701997.4056, -7812401.86, 2626987.386962);
Map1.MapTools.PanZoomBar.Enabled = true;
Map1.MapTools.MouseCoordinate.Enabled = true;
Map1.MapUnit = GeographyUnit.Meter;
SimpleMarkerOverlay markerOverlay = new SimpleMarkerOverlay("MarkerOverlay");
markerOverlay.DragMode = MarkerDragMode.Drag;
markerOverlay.Markers.Add(new Marker(-8922952.93266, 2984101.58384, new WebImage(21, 25, -10.5f, -25f)));
markerOverlay.Markers.Add(new Marker(-10830821.09801, 4539747.98328, new WebImage(21, 25, -10.5f, -25f)));
Map1.CustomOverlays.Add(markerOverlay);
}
Client:
Use Draggable Markers