Hi Ravi,
It is possible to prevent the dialogs being displayed when double-clicking on the ChartSeries by setting the AllowUserEditStyle Property to false.
Example:
this.chartControl1.AllowUserEditStyles = false; // SeriesStyle editor dialog will not be displayed when double-clicked on the Series in Chart.
Also it is possible to prevent the dialogs being displayed when double-clicking the chart legend by setting the ChartControl.legend.Style to ChartLegendStyle.Empty.
Example:
this.chartcontrol1.Legend.Style=ChartLegendStyle.Empty; // Nothing will be displayed when double-clicked on the legend. User can drag the legend.
I have attached the sample illustrating the same in this link below.
http://websamples.syncfusion.com/samples/Chart.Windows/F74525/main.htmPlease let me know if you have any other queries. Thanks for your patience.
Regards,
Manohari.R