HarryPaek/EPLAN ? reverse-engineered prompt

Build me a simple EPLAN API sample project in C# that shows how to automate common EPLAN tasks and gives me a few working examples I can run and learn from.

I want it to be organized so I can open it in Visual Studio, understand the code, and see how the different sample areas fit together. Please make it include a couple of clear demo workflows, some basic documentation in the code comments, and anything needed so the examples are easy to try out without a lot of setup confusion.

If there are any EPLAN specific details that depend on current docs or the installed version, look them up online and use sensible defaults. Keep the project clean and practical, more like a training sample than a full product.