using System;

public class Program

{

    public static void Main()

    {

        try

        {

            TestingMethod();

        }

        catch(Exception ex)

        {

            Console.WriteLine(ex.ToString());

        }

    }

    public static void TestingMethod()

    {

        throw new Exception("Top level 1", new InvalidOperationException("level 2", new TimeoutException("level 3")));

    }

}