private void DrawLine(object parameter)
        {
            readytodrawPoint   = false;
            readytodrawLine    = !readytodrawLine;
            readytodrawPolygon = false;
            Linepointcollec.Clear();

            if (pointWin != null)
            {
                if (pointWin.IsVisible)
                {
                    pointwinshowing = false;
                    pointWin.Close();
                }
            }
            if (PolygonWin != null)
            {
                if (PolygonWin.IsVisible)
                {
                    PolygonWin.Close();
                    Polygonwinshowing = false;
                }
            }
        }