using System;

using System.Collections;

using System.Collections.Generic;

using System.Threading;

​

public class Program

{

    public static void Main()

    {

        //Console.WriteLine("Hello World");

        try

        {

            Retry.Do(() => ReIssue(), TimeSpan.FromSeconds(1), 5);

        }

        catch (Exception ex)

        {

            Console.WriteLine(ex);

        }

​

    }

​

    private static void ReIssue()

    {

        //Console.WriteLine("Hello World");

        throw new Exception("Hello World");

    }

​

}

​

public static class Retry

{

    public static void Do(Action action, TimeSpan retryInterval, int maxAttemptCount = 3)

    {

        Do<object>(() =>

        {

            action();

            return null;

        }

​

        , retryInterval, maxAttemptCount);

    }

​

    public static T Do<T>(Func<T> action, TimeSpan retryInterval, int maxAttemptCount = 3)

    {

        var exceptions = new List<Exception>();

        for (int attempted = 0; attempted < maxAttemptCount; attempted++)

        {

            try

            {

                if (attempted > 0)

                {

                    Thread.Sleep(retryInterval);

                }

​

                return action();

            }

            catch (Exception ex)

            {

                exceptions.Add(ex);

            }

        }

​

        throw new AggregateException(exceptions);

    }

}