private void ZoomToGraphic()
        {
            if (activeGraphic != null && activeGraphic.Geometry != null)
            {
                var graphicExtent = activeGraphic.Geometry.Extent;
                var mapExtent = MyMap.Extent;
                double mapExtentWidth = mapExtent.XMax - mapExtent.XMin;
                double mapExtentHeight = mapExtent.YMax - mapExtent.YMin;
                if (MyMap.Rotation != 0)
                {
                    mapExtentHeight = mapExtent.XMax - mapExtent.XMin;
                    mapExtentWidth = mapExtent.YMax - mapExtent.YMin;
                }
                //Just Center the map to your graphic
                MyMap.PanTo(graphicExtent.GetCenter());
                //Zoom using factor.
                double xRatio = mapExtentWidth / graphicExtent.Width;
                double yRatio = mapExtentHeight /graphicExtent.Height;
                MyMap.Zoom(xRatio > yRatio ? yRatio : xRatio);
            }
        }