How to handle exception in Parallel.For and Parallel.Foreach loop? – Task Parallel Library

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Collections.Concurrent;
namespace ParallelFor
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                DoSomeWork();
            }
            catch (AggregateException ex)
            {
                //loop through all the exception
                foreach(Exception e in ex.InnerExceptions)
                {
                    if (e is ArgumentException)
                    {
                        Console.ForegroundColor = ConsoleColor.Red;
                        Console.WriteLine(e.Message);
                    }
                    else
                        throw e;
                }
            }
            Console.ReadLine();
        }
        public static void DoSomeWork()
        {
                //ConcurrentQueue allows to queue item from multiple threads.
            ConcurrentQueue<Exception> exceptionQueue = new ConcurrentQueue<Exception>();

            Parallel.For(0, 100, (i) =>
            {
                try
                {
                    if (i == 20 || i == 30 || i == 40)
                        throw new ArgumentException();

                    Console.Write("{0}, ", i);
                }
                catch (Exception e)
                {
                    //Adding all the exceptions thrown from multiple thread in queue
                    exceptionQueue.Enqueue(e);
                }
            });

            //throw all the exception as AggregateException after loop completes
            if (exceptionQueue.Count > 0) throw new AggregateException(exceptionQueue);
        }
    }
}

How to handle exception in Parallel.For and Parallel.Foreach loop? – Task Parallel Library