Курсовая работа с C#.

[ApiController]
[Route("api/[controller]")]
public class ProductController : ControllerBase
{
    private readonly IProductService _service;

    public ProductController(IProductService service)
    {
        _service = service;
    }

    [HttpGet]
    public async Task<ActionResult<List<ProductDto>>>
        GetAll()
    {
        var products = await _service.GetAllAsync();
        return Ok(products);
    }

    [HttpGet("{id}")]
    public async Task<ActionResult<ProductDto>>
        GetById(int id)
    {
        var product = await _service.GetByIdAsync(id);
        if (product == null) return NotFound();
        return Ok(product);
    }

    [HttpPost]
    public async Task<ActionResult<ProductDto>>
        Create([FromBody] CreateProductDto dto)
    {
        var created = await _service.CreateAsync(dto);
        return CreatedAtAction(
            nameof(GetById),
            new { id = created.Id }, created);
    }
}