using System;

using System.Threading.Tasks;

public class Program

{

​

    public static void Main()

    {

        Console.WriteLine("App started.");

        try

        {

            var task = Task.Run(() => {

                throw new Exception("async test exception");

            });

            while(!task.IsCompleted)

            {

                System.Threading.Thread.Sleep(1000);

                Console.WriteLine(task.Status);

                Console.WriteLine(task.Status == TaskStatus.Faulted);

                Console.WriteLine(task.Exception.ToString());

                Console.WriteLine("task is running");

                // possible solution

                //  if (task.Status.Equals(TaskStatus.Faulted))

                //  {

                //      throw task.Exception;

                //  }

            }

        }

        catch (Exception exp)

        {

            Console.WriteLine("catch exception");

            Console.WriteLine(exp);

            throw;

        }

        Console.WriteLine("App completed.");

    }

}