public void ReDrawPoints(Series s1, double x, double y, Color c, string source1, string name1, string label1x, string labelValueText)
{
//s1.ChartType = SeriesChartType.Point;
string s = "source : " + source1 + "\n Name : " + name1 + "\nLable : " + label1x;
s1.ChartType = SeriesChartType.Point;
s1.MarkerSize = 20;
s1.MarkerStyle = MarkerStyle.Circle;
s1.Points.AddXY(x, y);
chart1.Series["My Series"].Points[incrementIndex].ToolTip = s;
chart1.Series["My Series"].Points[incrementIndex].Label = labelValueText;
s1.Points[incrementIndex].Color = c;
}