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The article you are referring to is about RadChart - an obsolete product, which was replaced by RadHtmlChart.
Please check the https://demos.telerik.com/aspnet-ajax/htmlchart/examples/charttypes/scatterchart/defaultcs.aspx demo of the RadHtmlChart for ASP.NET AJAX control, which demonstrates similar point-based rendering. You can find more information about the ScatterChart in the documentation: https://docs.telerik.com/devtools/aspnet-ajax/controls/htmlchart/chart-types/scatter-chart.
The article you are referring to is about RadChart - an obsolete product, which was replaced by RadHtmlChart.
Please check the https://demos.telerik.com/aspnet-ajax/htmlchart/examples/charttypes/scatterchart/defaultcs.aspx demo of the RadHtmlChart for ASP.NET AJAX control, which demonstrates similar point-based rendering. You can find more information about the ScatterChart in the documentation: https://docs.telerik.com/devtools/aspnet-ajax/controls/htmlchart/chart-types/scatter-chart.