csharp7.cs

using static System.Console;

static void Main(string[] args)
{  
    (int sum, int count) Tally(object[] values)
    {
        var r = (s: 0, c: 0);
        foreach (var v in values)
        {
            switch(v)
            {
                case int i:
                    r = (r.s + i, r.c + 1);
                    break;
                case object[] l:
                    var n = Tally(l);
                    r = (r.s + n.sum, r.c + n.count);
                    break; 
            }   
        }
        return r;
    }
    
    object[] numbers = { 0b1, 0b10, 0b100, new object[] { 0b100, 0b1_0000 }, 0b10_0000 };
    var t = Tally(numbers);
    WriteLine($"Sum: {t.sum}, count: {t.count}");      
}