using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var innerEx = new List<Exception>();

        for(var i = 1;i<4;i++)

        {

            try

            {

                TestMethod(i);

            }

            catch(Exception ex)

            {

                innerEx.Add(ex);

            }

        }

        var test = new AggregateException(innerEx);

        Console.WriteLine(test.ToString());

    }

    public static void TestMethod(int i)

    {

        if(i%2 == 0)

            throw new ArgumentException(i.ToString());

        try

        {

            TestSubMethod(i);

        }

        catch(Exception ex)

        {

            throw new Exception("See innerException",ex);   

        }

    }

    public static void TestSubMethod(int i)

    {

        throw new Exception(i.ToString());

    }

}