public Customer Get(string id)
 {
     using (NorthwindDBEntities objNorthwindDBEntities = new NorthwindDBEntities())
     {
         return(objNorthwindDBEntities.Customers.FirstOrDefault(c => c.CustomerID == id));
     }
 }
 public IEnumerable <Customer> Get()
 {
     using (NorthwindDBEntities objNorthwindDBEntities = new NorthwindDBEntities())
     {
         return(objNorthwindDBEntities.Customers.ToList());
     }
 }