using System;

using System.Linq;

using System.Collections.Generic;

using System.Threading.Tasks;

using System.Threading;

​

public class Program

{

    public static async Task Main()

    {

        var groups = new List<string>{ "a", "b" };

        try

        {

            groups.ForEach(async s =>

            {

                await Task.Delay(50);

                throw new Exception($".ForEach exception");

            });

            Console.WriteLine("After .ForEach()");

            foreach (var g in groups)

            {

                await Task.Delay(50);

                throw new Exception($"foreach loop exception");

            }

        }

        catch (Exception e)

        {

            Console.WriteLine(e);

        }

    }

}

​