// DELETE api/employees/5
        public HttpResponseMessage Delete(int id)
        {
            using (WebApiDB.EmployeesDBEntities entities = new WebApiDB.EmployeesDBEntities())
            {
                try
                {
                    var entity = entities.Employees.FirstOrDefault(e => e.PersonID == id);

                    if (entity == null)
                    {
                        return(Request.CreateErrorResponse(HttpStatusCode.NotFound, "Employee with id =" + id + " does not found."));
                    }
                    else
                    {
                        entities.Employees.Remove(entities.Employees.FirstOrDefault(e => e.PersonID == id));
                        entities.SaveChanges();
                        return(Request.CreateResponse(HttpStatusCode.OK, entity));
                    }
                }
                catch (Exception ex)
                {
                    return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex));
                }
            }
        }
        // PUT api/employees/5
        public HttpResponseMessage Put(int id, [FromBody] Employee employee)
        {
            using (WebApiDB.EmployeesDBEntities entities = new WebApiDB.EmployeesDBEntities())
            {
                try
                {
                    var entity = entities.Employees.FirstOrDefault(e => e.PersonID == id);

                    if (entity == null)
                    {
                        return(Request.CreateErrorResponse(HttpStatusCode.NotFound, "Employee with id =" + id + " does not found."));
                    }
                    else
                    {
                        entity.LastName  = employee.LastName;
                        entity.FirstName = employee.FirstName;
                        entity.Address   = employee.Address;
                        entity.City      = employee.City;

                        entities.SaveChanges();

                        return(Request.CreateResponse(HttpStatusCode.OK, entity));
                    }
                }
                catch (Exception ex)
                {
                    return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex));
                }
            }
        }