how to get x coordinate and y coordinate of line chart drawn on chart control in windows form application as a tool tip when mouse moved over it

<pre lang="cs">Point? clickPosition = null;
        ToolTip tooltip = new ToolTip();
private void chart1_MouseMove(object sender, MouseEventArgs e)
{

    var pos = e.Location;
    clickPosition = pos;
    var results = chart1.HitTest(pos.X, pos.Y, false,
                                 ChartElementType.DataPoint);
    foreach (var result in results)
    {
        if (result.ChartElementType == ChartElementType.DataPoint)
        {

            int index = result.PointIndex;


         

            tooltip.Show(&quot;X=&quot; + result.Series.Points[result.PointIndex].XValue + &quot;,\nY=&quot; + result.Series.Points[result.PointIndex].YValues[0],
                         this.chart1, e.Location.X, e.Location.Y - 15);
        }
        else
        {
            tooltip.Hide(this.chart1);
        }
    }
}</pre>