vijaythapa333/anystore ? reverse-engineered prompt

Build me a simple desktop billing and inventory management app for a small shop.

I want it to let an admin and normal user log in, then manage users, categories, and products. It should also handle buying stock from a dealer, selling products to customers, and showing a clear transaction history for purchases and sales by date. The app should feel like a straightforward business tool, with forms for adding, updating, and deleting records, and a clean way to view current inventory and past activity.

Use C# with a SQL Server database, and keep it organized in a simple business style so it’s easy to maintain. If you need to check current setup details or best practices, look them up online first. Also, make it work as a ready to run project that I can open, connect to the database, and use right away.