// PUT api/Customer/5
        public HttpResponseMessage PutCustomer(int id, Customer customer)
        {
            if (!ModelState.IsValid)
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }

            if (id != customer.id)
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest);
            }
          
          
            
            try
            {
                repo.updateCustomer(customer);
               
            }
            catch (DbUpdateConcurrencyException ex)
            {
                return Request.CreateErrorResponse(HttpStatusCode.NotFound, ex);
            }

            return Request.CreateResponse(HttpStatusCode.OK);
        }
 // POST api/Customer
 public HttpResponseMessage PostCustomer(Customer customer)
 {
     if (ModelState.IsValid)
     {
         repo.AddCustomer(customer);
         HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, customer);
         response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = customer.id }));
         return response;
     }
     else
     {
         return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
     }
 }
 public void deleteCustomer(Customer customer)
 {
     db.Customers.Remove(customer);
     db.SaveChanges();
 }
 public Customer updateCustomer(Customer customer)
 {
     
     db.Entry(customer).State = EntityState.Modified;
     db.SaveChanges();
 }
 public Customer AddCustomer(Customer customer)
 {
     db.Customers.Add(customer);
     db.SaveChanges();
 }