private async Task <HttpResponseMessage> HttpPut(HttpControllerContext controllerContext) // if Put Request Method
        {
            HttpResponseMessage retVal = null;
            string contentAsString     = await controllerContext.Request.Content.ReadAsStringAsync();

            StudentMember postedStudentMember = await Newtonsoft.Json.JsonConvert.DeserializeObjectAsync <StudentMember>(contentAsString);

            if (StudentMemberRepositories.IsExist(postedStudentMember.FullName))
            {
                retVal = controllerContext.Request.CreateErrorResponse(HttpStatusCode.BadRequest, "Unable to find Student Member with given Id");
            }
            else
            {
                StudentMemberRepositories.Update(postedStudentMember);
                retVal = controllerContext.Request.CreateResponse(HttpStatusCode.OK, postedStudentMember);
            }
            return(retVal);
        }
        private async Task <HttpResponseMessage> HttpPost(HttpControllerContext controllerContext)// if Post Request Method
        {
            HttpResponseMessage retVal = null;
            string contentAsString     = await controllerContext.Request.Content.ReadAsStringAsync();

            StudentMember postedStudentMember = await Newtonsoft.Json.JsonConvert.DeserializeObjectAsync <StudentMember>(contentAsString);

            if (StudentMemberRepositories.IsExist(postedStudentMember.FullName))
            {
                retVal = controllerContext.Request.CreateErrorResponse(HttpStatusCode.BadRequest, "Another Studen member the same Fullnam is already exist.");
            }
            else
            {
                StudentMember studentMember = StudentMemberRepositories.Add(postedStudentMember.FullName, postedStudentMember.Age, postedStudentMember.Section
                                                                            , postedStudentMember.ClassNumber);
                retVal = controllerContext.Request.CreateResponse(HttpStatusCode.OK, studentMember);
            }
            return(retVal);
        }
        private HttpResponseMessage HttpDelete(HttpControllerContext controllerContext) //Delete Request Method
        {
            HttpResponseMessage retVal = null;

            var id = controllerContext.RouteData.Values["id"]; // Gelen Get İsteğinde Gelen Parametreyi Alıyoruz.

            if (id == null)
            {
                retVal = controllerContext.Request.
                         CreateErrorResponse(HttpStatusCode.BadRequest, "Cannot call this metod withot Id.");;
            }
            else
            {
                int idAsInteger;
                if (!int.TryParse(id.ToString(), out idAsInteger))
                {
                    retVal = controllerContext.Request.
                             CreateErrorResponse(HttpStatusCode.BadRequest, "Id must be a numaric value.");
                }
                else
                {
                    if (StudentMemberRepositories.IsExist(idAsInteger))
                    {
                        retVal = controllerContext.Request.
                                 CreateErrorResponse(HttpStatusCode.BadRequest, "Unable to find Student Member with given Id.");
                    }
                    else
                    {
                        StudentMemberRepositories.Remove(idAsInteger);
                        retVal = controllerContext.Request.
                                 CreateResponse(HttpStatusCode.OK);
                    }
                }
            }

            return(retVal);
        }