class Program {
    static void Main(string[] args) {
        object[] numbers = {
            0b1,
            0b10,
            0b1_0000,
            0b10_0000,
            new object[]{0b100, 0b1000} // binary literals
        }; // digit separators
        var(sum, count) = Tally(numbers); // deconstruction
        WriteLine($ "Sum: {sum}, Count: {count}");
    }
    static (int sum, int count) Tally(object[] values) { // tuple types
        var r = (s : 0, c : 0); // tuple literals
        void Add(int s, int c) {
            r = (r.s + s, r.c + c);
        } // local functions
        foreach(var v in values) {
            switch (v) { // switch on any value
                case int i: // type patterns
                    Add(i, 1);
                    break;
                case object[] a when a.Length > 0: // case conditions
                    var t = Tally(a);
                    Add(t.sum, t.count);
                    break;
            }
        }
        return r;
    }
}