OOOOOAPI/androidAPI/Controllers/GenderController.cs

using androidAPI.BaseConneckion;
using androidAPI.ModelBase;
using Microsoft.AspNetCore.Mvc;

namespace androidAPI.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    [ApiExplorerSettings(GroupName = "Действия с полом собачки")]
    public class GenderController : Controller
    {
        MainTheApplication oo = new MainTheApplication();
        [HttpPost]

        public IActionResult Index(Gender gender)
        {
            oo.Add(gender);
            oo.SaveChanges();
            return Ok(gender);
        }
    }
}