using System;
using System.Threading.Tasks;
 
public class Test
{
	public static void Main()
	{
        var sequencer = new MessagingSequencer();
        sequencer.AddMessage("アータタタタタタ");
        sequencer.AddPause(2000);
        sequencer.AddMessage("アータタタタタタ");
        sequencer.AddPause(2000);
        sequencer.AddMessage("オーワターっ");
        sequencer.AddPause(3000);
        sequencer.AddMessage("お前はもう死んでいる。");
        Console.ReadKey();
	}
}
 
interface IMessagingJob
{
    void Action();
}
 
class MessageJob : IMessagingJob
{
    public MessageJob(string msg)
    {
        Message = msg;
    }
 
    public string Message { get; private set; }
 
    void IMessagingJob.Action()
    {
        Console.WriteLine(Message);
    }
}
 
class PauseJob : IMessagingJob
{
    public PauseJob(int milliSec)
    {
        Pause = milliSec;
    }
 
    public int Pause { get; private set; }
 
 
    void IMessagingJob.Action()
    {
        Task.Delay(Pause).Wait();
    }
}
 
class MessagingSequencer
{
    public MessagingSequencer()
    {
        MessagingTask = Task.Run(() => { });
    }
 
    private Task MessagingTask { get; set;}
 
    public void AddJob(IMessagingJob job)
    {
        MessagingTask = MessagingTask.ContinueWith(t => job.Action());
    }
 
    public void AddMessage(string message)
    {
        AddJob(new MessageJob(message));
    }
 
    public void AddPause(int milliSec)
    {
        AddJob(new PauseJob(milliSec));
    }
 
}
 

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