ConsoleKbhitEvent

using System;
using System.Threading;
using System.Collections.Generic;

class ConsoleKbhit
{
    public class ConsoleKbhitEventArgs
    {
        public ConsoleKbhitEventArgs()
        {
            isCancel = false;
            Console.CursorVisible = false;
        }

        public bool isCancel
        {
            get { return cancel == 1; }
            set { Interlocked.Exchange(ref cancel, value ? 1 : 0); }
        }

        public ConsoleKeyInfo keyInfo { get; set; }
        volatile int cancel;
    }

    public void StartListening()
    {
        if (ConsoleKbhitEvent == null)
            throw new ArgumentNullException("需先绑定事件：ConsoleKbhitEvent");
        trd = new Thread(new ThreadStart(() =>
        {
            do
            {
                args.keyInfo = Console.ReadKey(true);
                ConsoleKbhitEvent(this, args);
            } while (!args.isCancel);
        }));
        trd.Start();
    }

    public bool isListening
    {
        get { return trd != null && trd.ThreadState == ThreadState.Running; }
    }

    public void MarkStop()
    {
        args.isCancel = true;
    }

    private ConsoleKbhitEventArgs args = new ConsoleKbhitEventArgs();
    private Thread trd;

    public delegate void ConsoleKbhitEventHandler(object sender, ConsoleKbhitEventArgs e);
    public event ConsoleKbhitEventHandler ConsoleKbhitEvent;
}

class Program
{
    const short Width = 10, Height = 20;

    static void GotoAndPut(int X, int Y, char C)
    {
        Console.CursorLeft = X;
        Console.CursorTop = Y;
        Console.Write(C);
    }

    static void Main()
    {
        var kbhit = new ConsoleKbhit();
        kbhit.ConsoleKbhitEvent += new ConsoleKbhit.ConsoleKbhitEventHandler(kbhit_ConsoleKbhitEvent);
        kbhit.StartListening();
        Console.Write('■');
        while (kbhit.isListening)
        {
            Thread.Sleep(500);
            lock(thisLock)
            {
                if (Y < Height - 1)
                    MoveTo(delegate { Y++; });
                else
                    X = Y = 0;
            }
        }
    }

    static void MoveTo(Action f)
    {
        GotoAndPut(X, Y, ' ');
        f();
        GotoAndPut(X, Y, '■');
    }

    static void kbhit_ConsoleKbhitEvent(object sender, ConsoleKbhit.ConsoleKbhitEventArgs e)
    {
        if (e.keyInfo.Key == ConsoleKey.Escape || e.keyInfo.Key == ConsoleKey.Q)
        {
            e.isCancel = true;
            return;
        }
        lock (thisLock)
        {
            switch (e.keyInfo.Key)
            {
                case ConsoleKey.W: break;
                case ConsoleKey.S: if (Y < Height - 1) MoveTo(delegate { Y++; }); else X = Y = 0; break;
                case ConsoleKey.A: MoveTo(delegate { if (X > 0) X -= 2; }); break;
                case ConsoleKey.D: MoveTo(delegate { if (X < Width * 2 - 2) X += 2; }); break;
            }
        }
    }

    static object thisLock = new object();
    static int X = 0, Y = 0;
}