or
chrtServices.PlotArea.Appearance.Dimensions.SetDimensions(Telerik.Reporting.Charting.Styles.Unit.Pixel(500), Telerik.Reporting.Charting.Styles.Unit.Pixel(3000))
2.chrtServices.PlotArea.Appearance.Dimensions.Height = Telerik.Reporting.Charting.Styles.Unit.Pixel(Convert.ToInt32(Request.QueryString("Height")) + 1000)
But no one is working. My application is that as per my data .I have to set a Height of Chart.