hassanra12144/ECommerce-API ? reverse-engineered prompt

Build me a simple e commerce backend API called SaltanatEAkbar API.

I want it to be a clean C# web API that can support a basic online store, with products, categories, customers, carts, and orders. It should let someone browse products, see details, add items to a cart, place an order, and manage the store data through normal API endpoints. Include basic validation, sensible error handling, and a simple way to keep the code organized so it’s easy to grow later.

If it makes sense, add authentication for users and a separate admin flow for managing products and orders. Please set it up in a way that runs locally without a lot of extra effort, and use current best practices for an API project. If you need to check the latest docs for any C# or ASP.NET details, go ahead and look them up online.