using System;

using System.Diagnostics;

using System.IO;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

​

​

public class Demo

{

    static async Task foo()

    {

        await Task.Delay(100);

        throw new Exception("This exception is expected!"); 

    }

    static async void foo2()

    {

        await Task.Delay(100);

        throw new Exception("This exception is expected!"); 

    }

    public static void Main()

    {

      var task1 = new Task(foo2, CancellationToken.None, TaskCreationOptions.LongRunning);

      task1.Start();

      //var task1 = Task.Run(foo);

      try

      {

          task1.Wait();

      }

      catch (AggregateException ae)

      {

          foreach (var e in ae.InnerExceptions) {

              if (e is Exception) {

                  Console.WriteLine("E: " + e.Message);

              }

              else {

                  throw;

              }

          }

      }

    }

}

​