This video shows how to create a circular progress bar using C# (.net 4.5 framework)

To code this project I used: drawpie and drawstring and Task.Run function.

you can share this video with your friend and use in your project

Java: https://www.youtube.com/watch?v=zA82Mp5BXC4

Objective-C/Cocoa: https://www.youtube.com/watch?v=mGvKesOTvug