public HttpResponseMessage Delete(int id)
        {
            try
            {
                using (EmplyeeDBEntities entities = new EmplyeeDBEntities())
                {
                    var entity = entities.Employees.FirstOrDefault(e => e.ID == id);

                    if (entity != null)
                    {
                        entities.Employees.Remove(entities.Employees.FirstOrDefault(e => e.ID == id));
                        entities.SaveChanges();
                        return(Request.CreateResponse(HttpStatusCode.OK));
                    }
                    else
                    {
                        return(Request.CreateResponse(HttpStatusCode.NotFound, $"Employee with id {id} is not found"));
                    }
                }
            }
            catch (Exception ex)
            {
                return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex));
            }
        }
        public HttpResponseMessage Put(int id, [FromBody] Employee employee)
        {
            try
            {
                using (EmplyeeDBEntities entities = new EmplyeeDBEntities())
                {
                    var entity = entities.Employees.FirstOrDefault(e => e.ID == id);

                    if (entity != null)
                    {
                        entity.FirstName = employee.FirstName;
                        entity.LastName  = employee.LastName;
                        entity.Salary    = employee.Salary;
                        entity.Gender    = employee.Gender;
                        entities.SaveChanges();
                        return(Request.CreateResponse(HttpStatusCode.OK));
                    }
                    else
                    {
                        return(Request.CreateResponse(HttpStatusCode.NotFound, $"Employee with id {id} is not found"));
                    }
                }
            }
            catch (Exception ex)
            {
                return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex));
            }
        }
        public HttpResponseMessage Post([FromBody] Employee employee)
        {
            try
            {
                using (EmplyeeDBEntities entities = new EmplyeeDBEntities())
                {
                    entities.Employees.Add(employee);
                    entities.SaveChanges();

                    var message = Request.CreateResponse(HttpStatusCode.Created, employee);
                    message.Headers.Location = new Uri(Request.RequestUri, employee.ID.ToString());
                    return(message);
                }
            }
            catch (Exception ex)
            {
                return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex));
            }
        }