JNM Controls .NET

.NET Winforms UI Library for creating Desktop applications with .NET. 

• Grid- and Tree-List (Sort. Group columns, Excel-style...)
• Custom Textbox, Panels, DropDown with Grid and filters, progressbar slider, rating and many more.
• Controls are owner-drawn: Custom renderers that can also be overriden
• Demo C# Project included with samples for each control
• Based on Winforms so should work with Mono as well (Linux, Mac OS, ...)

https://www.youtube.com/watch?v=8yJ0flsCBDY

And on the jayanam homepage there is an article:

https://jayanam.com/winforms-net-data-grid-control-framework/