protected override void OnMouseWheel(MouseEventArgs e)
       {
           try
           {
                if (e.Delta < 0)
                {
                    chart2.ChartAreas[0].AxisX.ScaleView.ZoomReset(1);
                    chart2.ChartAreas[0].AxisY.ScaleView.ZoomReset(1);
                }

                if (e.Delta > 0)
                {
                    double xMin = chart2.ChartAreas[0].AxisX.ScaleView.ViewMinimum;
                    double xMax = chart2.ChartAreas[0].AxisX.ScaleView.ViewMaximum;
                    double yMin = chart2.ChartAreas[0].AxisY.ScaleView.ViewMinimum;
                    double yMax = chart2.ChartAreas[0].AxisY.ScaleView.ViewMaximum;

                    double posXStart = chart2.ChartAreas[0].AxisX.PixelPositionToValue(e.Location.X) - (xMax - xMin) / 4;
                    double posXFinish = chart2.ChartAreas[0].AxisX.PixelPositionToValue(e.Location.X) + (xMax - xMin) / 4;
                    double posYStart = chart2.ChartAreas[0].AxisY.PixelPositionToValue(e.Location.Y) - (yMax - yMin) / 4;
                    double posYFinish = chart2.ChartAreas[0].AxisY.PixelPositionToValue(e.Location.Y) + (yMax - yMin) / 4;

                    chart2.ChartAreas[0].AxisX.ScaleView.Zoom(posXStart, posXFinish);
                    chart2.ChartAreas[0].AxisY.ScaleView.Zoom(posYStart, posYFinish);
                }
            }

            catch (Exception)
            {
                OnMouseWheel(e);
            }
        }