问ASP.NET MVC Web Api仅在1个Http方法中可用，但如果它有其他方法，则不会抛出Http Statuscode406

EN

private bool CheckAllowedMethod(HttpMethod allowed, HttpMethod given)
{
    if (allowed == given)
    {
        return true;
    }

    throw new InvalidMethodException("This method is not available over " + Request.Method.Method);
}

[AcceptVerbs("GET", "POST", "PUT", "DELETE")]
[Route("api/Auth/Login/{apikey}")]
public HttpResponseMessage GenerateLoginCode(string apikey = "") {
 HttpResponseMessage response = CreateResponse();

 try {
  CheckAllowedMethod(HttpMethod.Post, Request.Method);

  ChangeContent(response, JSONString.Create(Apikey.Login(apikey)));
 } catch (Exception ex) {
  ChangeContent(response, Error.Create(ex));
 }

 return response;
}

private HttpResponseMessage CreateResponse() {
 return Request.CreateResponse(HttpStatusCode.OK);
}

private void ChangeContent(HttpResponseMessage res, string data) {
 res.Content = new StringContent(data, System.Text.Encoding.UTF8, "application/json");
}

private bool CheckAllowedMethod(HttpMethod allowed, HttpMethod given) {
 if (allowed == given) {
  return true;
 }

 throw new InvalidMethodException("This method is not available over " + Request.Method.Method);
}