public bool Update(Customers originalCustomer, Customers updatedCustomer)
 {
     try
     {
         _ctx.Entry(originalCustomer).CurrentValues.SetValues(updatedCustomer);
         SaveAll();
     }
     catch
     {
         return false;
     }
     return true;
 }
 public int Insert(Customers customer)
 {
     try
     {
         _ctx.Customers.Add(customer);
         SaveAll();
         return customer.Id;
     }
     catch
     {
         return -1;
     }
 }