public HttpResponseMessage Put(int id, Employee employee)
        {
            try
            {
                using (EmployeeRecordsEntities entities = new EmployeeRecordsEntities())
                {
                    var entity = entities.Employees.FirstOrDefault(e => e.ID == id);
                    if (entity != null)
                    {
                        entity.firstName = employee.firstName;
                        entity.lastName  = employee.lastName;
                        entity.Gender    = employee.Gender;
                        entity.salary    = employee.salary;
                        entities.SaveChanges();
                        return(Request.CreateResponse(HttpStatusCode.OK, "Success"));
                    }


                    else
                    {
                        return(Request.CreateErrorResponse(HttpStatusCode.NotFound, "Employee with ID =" + id.ToString() + " is not found"));
                    }
                }
            }
            catch (Exception ex) {
                return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex));
            }
        }
        public HttpResponseMessage post(Employee employee)
        {
            try
            {
                using (EmployeeRecordsEntities entities = new EmployeeRecordsEntities())
                {
                    entities.Employees.Add(employee);
                    entities.SaveChanges();

                    return(Request.CreateResponse(HttpStatusCode.OK, "Added Successfully"));
                }
            }
            catch (Exception ex)
            {
                return(Request.CreateResponse(HttpStatusCode.BadRequest));
            }
        }
 public HttpResponseMessage Delete(int id)
 {
     try
     {
         using (EmployeeRecordsEntities entities = new EmployeeRecordsEntities())
         {
             var entity = entities.Employees.FirstOrDefault(e => e.ID == id);
             if (entity == null)
             {
                 return(Request.CreateErrorResponse(HttpStatusCode.NotFound, "Employee  with ID =" + id.ToString() + " is not found"));
             }
             else
             {
                 entities.Employees.Remove(entity);
                 entities.SaveChanges();
                 return(Request.CreateResponse(HttpStatusCode.OK, entity));
             }
         }
     }
     catch (Exception ex) {
         return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex));
     }
 }