using System;

​

class Foo

{

    int _id;

​

    public Foo(int id)

    {

        _id = id;

        Console.WriteLine($"Creating Foo{_id}");

    }

​

    public void Inner()

    {

        Console.WriteLine($"Entering Foo{_id}.Inner()");

        Console.WriteLine($"Leaving Foo{_id}.Inner()");

    }

​

    public void Outer()

    {

        Console.WriteLine($"Entering Foo{_id}.Outer()");

        Inner();

        Console.WriteLine($"Leaving Foo{_id}.Outer()");

    }

}

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Entering Main()");

        Foo [] foo = new Foo[5];

        for(int i = 0; i < foo.Length; i++)

            foo[i] = new Foo((i + 1) * 10);

        for(int i= 0; i < foo.Length; i++)

            foo[i].Outer();

        Console.WriteLine("Leaving Main()");

    }

}