C# Webapi 简单的依赖注入-构造函数

using Microsoft.AspNetCore.Mvc;
using WebApplication1.IServices;
using WebApplication1.Utility.SwaggerExt;

namespace WebApplication1.Controllers
{
    [ApiController]
    [Route("[controller]")]
    // 指定当前的控制器是哪个Swagger版本的  指定给 后台_version02
    [ApiExplorerSettings(IgnoreApi = false, GroupName = nameof(ApiVersions.endApi))]
    public class LoginController : ControllerBase
    {
        private readonly Calc calc;
        public LoginController(Calc calc)
        {
            this.calc = calc;
        }
        [HttpGet]
        public int TestAdd(int i , int j)
        {
            return calc.Add(i, j);
        }
    }
}

namespace WebApplication1
{
    public class Calc
    {
        public int Add(int i,int j)
        {
            return i + j;
        }
    }
}