using System;

public class Program

{

    [Flags]

    public enum FeatureId : ulong

    {

        None = 0,

        Zero = 1UL << 0,

        One = 1UL << 1,

        Test = 1UL << 63,

        Silly = 1UL << 64,

        Silly2 = 1UL << 65

    }

    public static void Main()

    {

        Console.WriteLine((ulong)FeatureId.None);

        Console.WriteLine((ulong)FeatureId.Zero);

        Console.WriteLine((ulong)FeatureId.One);

        Console.WriteLine((ulong)FeatureId.Test);

        Console.WriteLine((ulong)FeatureId.Silly);

        Console.WriteLine((ulong)FeatureId.Silly2);

    }

}