using System;

public class Program

{

    public static void Main()

    {

        try

        {

            var DidIMakeAMess = new DisposeMe();

            for(int i = 0; i < 5; i--)

            {

                int j = 1 / i;

            }

            DidIMakeAMess.Dispose();

        }

        catch{}

        try

        {

            using(var DidIMakeAMess = new DisposeMe())

            {

                for(int i = 0; i < 5; i--)

                {

                    int j = 1 / i;

                }

            }

        }

        catch{}

    }

}

​

public class DisposeMe : IDisposable

{

    public void Dispose()

    {

        Console.WriteLine("I'm done.");

    }

}