Bitwise flags in c#

BitwiseFlags.cs

class Program
{
    [Flags]
    public enum PizzaToppings
    {
        Cheese = 1,
        Bacon = 1 << 1,
        Avo = 1 << 2,
        Pineapple = 1 << 3,
        Mushrooms = 1 << 4,
        Pepperoni = 1 << 5
    }

    public static class Toppings
    {
        // public const uint Cheese = 1;        // 0b000001
        // public const uint Bacon = 2;         // 0b000010
        // public const uint Avo = 4;           // 0b000100
        // public const uint Pineapple = 8;     // 0b001000
        // public const uint Mushrooms = 16;    // 0b010000
        // public const uint Pepperoni = 32;    // 0b100000
        public const uint Cheese = 1;
        public const uint Bacon = 1 << 1;
        public const uint Avo = 1 << 2;
        public const uint Pineapple = 1 << 3;
        public const uint Mushrooms = 1 << 4;
        public const uint Pepperoni = 1 << 5;
    }

    public static bool CanTheyOrder(
            uint userToppings, 
            uint availableToppings
    ) => (availableToppings & userToppings) == userToppings;

    public static bool CanTheyOrder(
            PizzaToppings userToppings, 
            PizzaToppings availableToppings
    ) => (availableToppings & userToppings) == userToppings;


    public static void Main()
    {
        var goodUserChoice = PizzaToppings.Avo| PizzaToppings.Mushrooms;
        var badUserChoice = PizzaToppings.Pepperoni | PizzaToppings.Mushrooms;
        var availableChoice = PizzaToppings.Pineapple | PizzaToppings.Mushrooms 
            | PizzaToppings.Cheese | PizzaToppings.Avo;
         
        
        string userBadChoiceBin = Convert.ToString((uint)badUserChoice, 2);
        string userGoodChoiceBin = Convert.ToString((uint)goodUserChoice, 2);
        string availableChoiceBin = Convert.ToString((uint) availableChoice, 2);
        Console.WriteLine($"User Good Choice: {userGoodChoiceBin}");
        Console.WriteLine($"User Bad Choice: {userBadChoiceBin}");
        Console.WriteLine($"Available Choice: {availableChoiceBin}");
        if(CanTheyOrder(goodUserChoice, availableChoice)){
            Console.WriteLine("They can order it.");
        } else {
            Console.WriteLine("Nope, not available.");
        }
        if(CanTheyOrder(badUserChoice, availableChoice)){
            Console.WriteLine("They can order it.");
        } else {
            Console.WriteLine("Nope, not available.");
        }

    }
}