RKITSoftware/dimplebhanushali ? reverse-engineered prompt

Build me a small C# learning project that shows a few different practice apps in one place. I want a simple repo with separate examples for basic API work, another API exercise sheet, an ASP.NET Core sample, a GUI practice app, and one example using DevExpress style controls or components if that fits. Keep it easy to open in Visual Studio and run the examples without a lot of setup.

The goal is for this to feel like a training playground, not a polished product. Use clean, readable code, simple screens, and a few basic endpoints or forms that a beginner could learn from. Add enough sample data and comments so someone can understand what each part is doing. If you need to check current .NET guidance or control docs online, go ahead and use that.