public void Update(ProductViewModel product)
{
var entity = new Product();
entity.ProductID = product.ProductID;
entity.ProductName = product.ProductName;
entity.UnitPrice = product.UnitPrice;
entity.UnitsInStock = (short)product.UnitsInStock;
entity.Discontinued = product.Discontinued;
entities.Products.Attach(entity);
entities.Entry(entity).State = EntityState.Modified;
entities.SaveChanges();
}
