program.cs

using System;

namespace Test
{
    class Program
    {
        void Recur(int x)
        {
            Console.WriteLine("In " + x);
            if (x > 0) {
                Console.WriteLine("Descend " + x);
                Recur(x - 1); // BREAKPOINT HERE
            }
            Console.WriteLine("Out " + x);
        }

        static void Main(string[] args)
        {
            Program p = new Program();
            p.Recur(2);
        }
    }
}