using System;

public class Program

{

    public static void Main()

    {

        try 

        {

            Console.WriteLine("OUTER TRY:");

​

            DoIt();

        } 

        catch( Exception ex)

        {

            Console.WriteLine("OUTER CATCH: CAUGHT:" + ex.Message);

            // swallow

        }

        /*finally

        {

            Console.WriteLine("outer finally");

        }*/

    }

    static void DoIt() 

    {

        try 

        {

            Console.WriteLine("DoIt(): INNER TRY -> CAUSES EXCEPTION...");

            int i = 0;

            Console.WriteLine(12 / i); // oops

        } 

        catch (Exception e) 

        {

            Console.WriteLine("DoIt(): INNER CATCH => CATCHES & RETHROWS EXCEPTION:" + e.Message);

            e = new Exception("[EXCEPTION COMING FROM: DoIt(): INTERNAL]");

            throw e; //RETHROWS e or "throw", or "throw anything"

        } 

        finally 

        {

            Console.WriteLine("DoIt(): INNER FINALLY");

        }

    }

}