Linq - Cross join sample

public void Linqsample()
{
    string[] categories = new string[]{  
        "Beverages", 
        "Condiments", 
        "Vegetables",
        "Dairy Products",  
        "Seafood" };
 
    List<Product> products = GetProductList();
 
 
 
    var q =
        from c in categories
        join p in products on c equals p.Category into ps
        from p in ps
        select new { Category = c, p.ProductName };
 
    foreach (var v in q)
    {
        Console.WriteLine(v.ProductName + ": " + v.Category);
    }
}