// GET: api/Products/5
 public ProductEntity Get(int id)
 {
     ProductEntity product;
     var productRepository = new ProductRepository();
     if (id > 0)
     {
         var products = productRepository.RetrieveTable();
         product = products.FirstOrDefault(p => p.ProductId.Equals(id));
     }
     else
     {
         product = productRepository.Create();
     }
     return product;
 }