'How to make the graphics for a Graph theory undirected graph

I have been trying for the last few days to implement a graph into a C# Windows Forms app, but I have been unsuccessful at this task. I haven't been able to find any useful tutorials and no libraries I could figure out how to use.

During my search I was able to find this video: https://www.youtube.com/watch?v=flfzSE81Gss&ab_channel=LaurynasSimonaitis

It is the exact app I am trying to implement, but the source code is unavailable, so I am looking for some help. Are there any libraries for graphs or any tutorials that can be used to create a similar app? Or one that at least can connect nodes and make the graph appear on the screen.



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