productscontroller2.cs

public class ProductsController : UmbracoApiController
{
    private readonly IEmailService emailService;

    public ProductsController(IEmailService emailService)
    {
        this.emailService = emailService;
    }

    public IEnumerable<string> GetAllProducts()
    {
        this.emailService.SendEmailToAdmin();
        return new[] { "Table", "Chair", "Desk", "Computer", "Beer fridge" };
    }
...