sample-product-and-product-collection-model-without-hal.cs

public class Product
{
  public int ProductId { get; set; }
  public string ProductName { get; set;}
  public decimal Price { get; set; }
}

public class ProductCollection
{
  public ProductCollection()
  {
    this.Items = new List<Product>();
  }

  public ProductCollection(IEnumerable<Product> items)
  {
    this.Items = items.ToList();
  }

  public List<Product> Items { get; private set; }
}