using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var ex1 = new ApplicationException("1");

        var ex2 = new ApplicationException("2");

        var aggEx = new AggregateException(new List<Exception>{ex1,ex2});

        try {

            try {

                throw aggEx;

            } catch (AggregateException) {

                //foreach(var aggInner in aggEx.InnerExceptions)

                //{

                    //Console.WriteLine("Inner" + aggInner.Message);

                //}

                throw;

            }

        }

        catch (AggregateException aggException) {

            foreach(var aggEx2 in aggException.InnerExceptions)

            {

                Console.WriteLine("Slack2: " + aggEx2.Message);

            }

            throw;

        } catch (Exception ex) {

            Console.WriteLine("Slack: " + ex.Message);

        };

    }

}