using System;

​

class Program

{

    static int n = 0;

    static int depth = 0;

​

    static void CountUp()

    {

        int saved = n;

​

        depth++;

        Console.WriteLine($"Enter n: {n}, saved: {saved}, depth: {depth}");

​

        n++;

        if (n < 10)

        {

            Console.WriteLine(n);

            CountUp();

        }

​

        Console.WriteLine($"Leave n: {n} saved: {saved}, depth: {depth}");

        depth--;

    }

​

    static void Main()

    {

        CountUp();

    }

}