Binding example for limiting argument options to enum values

enum_values.cs

[When(@"I sort by product name (ascending|descending)")]
public void WhenISortByProductName(SortOrder sortOrder)
{
    _products.Sort((s1, s2) =>
    {
        if (sortOrder == SortOrder.Descending)
            return s1.ProductName.CompareTo(s2.ProductName) * (-1);

        return s1.ProductName.CompareTo(s2.ProductName);
    });

    int i = 1;
    _products.ForEach(p => p.Index = i++);
}