如何在子类中具有多个泛型类型

public abstract class BaseController<T> : ApiController 
{

    protected APIResponseTO<T> _reponse;

    protected IHttpActionResult CreateResponse(HttpStatusCode httpStatus, T data)
    {
        _reponse = new APIResponseTO<T>()
        {
            HttpStatus = httpStatus,
            Data = data
        };
        return Ok(_reponse);
    }
}

现在我希望继承这个类的任何类都可以为T定义多个类型

 public class CustomerController : BaseController<T>
 {

    public IHttpActionResult Get()
    {

        var customers = _customerService.GetCustomers();
        //call Parent Class CreateResponse() to create IHttpActionResult object
        //here customers is IEnumerable<Customer>
        return CreateResponse(HttpStatusCode.Created, customers)
    }

    public IHttpActionResult Post([FromBody]Customer customer)
    {
        var custId= _customerService.AddCustomers();
        //call Parent Class CreateResponse() to create IHttpActionResult object
        //here customer is integer(Single Object)
        return CreateResponse(HttpStatusCode.Created, custId)
    }
}

public class CustomerController : BaseController<T> where T : Customer, IEnumerable<Customer>, int
 {
 }

 public IHttpActionResult Post<T>([FromBody]Customer customer)
  where T : int
    {
        var custId= _customerService.AddCustomers();
        //call Parent Class CreateResponse() to create IHttpActionResult object
        //here customer is integer(Single Object)
        return CreateResponse(HttpStatusCode.Created, custId)
    }