Thank you for writing.
The chart rendering engine paints the bar draw parts for each of the series separately. As a solution, I can suggest creating a collection in which you will have the data sorted prior to binding the chart. Additionally, you can also check the following section of our documentation demonstrating how custom draw parts can be created: Custom Rendering
I hope this information was useful. Should you have further questions please do not hesitate to write back.
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Check out the Windows Forms project converter, which aids the conversion process from standard Windows Forms applications written in C# or VB to Telerik UI for WinForms. For more information check out this blog post
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