using System;

​

public class Program

{

    public static void Main()

    {

        try

        {

            try

            {

                throw new TestException();

            }

            catch (TestException)

            {

                Console.WriteLine("Caught TestException");

                throw;

            }

            catch (Exception)

            {

                Console.WriteLine("Exception fell through");

            }

        }

        catch (Exception)

        {

            Console.WriteLine("Exception did not fall through");

        }

    }

​

    class TestException : Exception

    {

    }

}