public HttpResponseMessage Delete(int id)
        {
            try
            {
                using (EmployeeDatabaseForWebApiEntities entities = new EmployeeDatabaseForWebApiEntities())
                {
                    var entity = entities.Employees.FirstOrDefault(e => e.ID == id);
                    if (entity == null)
                    {
                        return(Request.CreateErrorResponse(HttpStatusCode.NotFound, "Employee with id = " + id.ToString() + " could not be found to delete"));
                    }
                    else
                    {
                        entities.Employees.Remove(entity);
                        entities.SaveChanges();

                        return(Request.CreateResponse(HttpStatusCode.OK));
                    }
                }
            }
            catch (Exception ex)
            {
                return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex));
            }
        }
        public HttpResponseMessage Put(int id, [FromBody] Employee employee)
        {
            try
            {
                using (EmployeeDatabaseForWebApiEntities entities = new EmployeeDatabaseForWebApiEntities())
                {
                    var entity = entities.Employees.FirstOrDefault(e => e.ID == id);
                    if (entity == null)
                    {
                        return(Request.CreateErrorResponse(HttpStatusCode.NotFound, "Employee With id = " + id.ToString() + " not found"));
                    }
                    else
                    {
                        entity.FirstName = employee.FirstName;
                        entity.LastName  = employee.LastName;
                        entity.Gender    = employee.Gender;
                        entity.Salary    = employee.Salary;

                        entities.SaveChanges();

                        return(Request.CreateResponse(HttpStatusCode.OK, entity));
                    }
                }
            }
            catch (Exception ex)
            {
                return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex));
            }
        }
        //[Route ("api/employees")]
        public HttpResponseMessage Post([FromBody] Employee employee)
        {
            try
            {
                using (EmployeeDatabaseForWebApiEntities entities = new EmployeeDatabaseForWebApiEntities())
                {
                    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 e)
            {
                return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, e));
            }
            // {"FirstName":"Waqar", "LastName":"Khan","Gender":"Male","Salary":50000}
        }