using System;

using System.Threading.Tasks;

using System.Threading;

​

​

public class Program

{

    public static void Main()

    {

        try

        {

            Console.WriteLine("Started...");

            new Worker().DoWork();

            Console.WriteLine("Success.");

        }

        catch(Exception ex)

        {

            Console.WriteLine($"Failure: {ex.Message}");

        }

        finally

        {

            Console.WriteLine("Exiting...");

        }

    }

}

​

public class Worker

{

    public void DoWork()

    {

        try

        {

            MyAsyncRunner1(Step1);

            MyAsyncRunner2(Step2);

            Console.WriteLine("Work completed.");

        }

        catch (Exception ex)

        {

            Console.WriteLine(ex.Message);

            throw ex;

        }           

    }

    private async void MyAsyncRunner1(Action action)

    {

        await Task.Run(action);

    }

    private async void MyAsyncRunner2(Func<Task> action)

    {

        await Task.Run(action);

    }

    private void Step1()

    {

        Thread.Sleep(1000);

        Console.WriteLine("Step 1 completed.");

    }

    private async Task Step2()

    {

        await Task.Delay(100);      

        Console.WriteLine("Step 2 completed.");

    }

}