}

=========================================================================

該定時器要避免的是System.Web.UI.Timer和System.Windows.Forms.Timer這是ASP應用程式和WinForms分別。 使用這些將導致服務載入的額外組裝這不是真正的應用程式，您需要的是建築型別。

使用類似下面的例子System.Timers.Timer另外，請確保您使用一個類級變數，以防止垃圾收集）：

using System; 
using System.Timers; 
public class Timer1 
{ 
    private static System.Timers.Timer aTimer; 
    public static void Main() 
    { 
        // Normally, the timer is declared at the class level, 
        // so that it stays in scope as long as it is needed. 
        // If the timer is declared in a long-running method,   
        // KeepAlive must be used to prevent the JIT compiler  
        // from allowing aggressive garbage collection to occur  
        // before the method ends. (See end of method.) 
        //System.Timers.Timer aTimer; 
        // Create a timer with a ten second interval. 
        aTimer = new System.Timers.Timer(10000); 
        // Hook up the Elapsed event for the timer. 
        aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent); 
        // Set the Interval to 2 seconds (2000 milliseconds). 
        aTimer.Interval = 2000; 
        aTimer.Enabled = true; 
        Console.WriteLine("Press the Enter key to exit the program."); 
        Console.ReadLine(); 
        // If the timer is declared in a long-running method, use 
        // KeepAlive to prevent garbage collection from occurring 
        // before the method ends. 
        //GC.KeepAlive(aTimer); 
    } 
    // Specify what you want to happen when the Elapsed event is  
    // raised. 
    private static void OnTimedEvent(object source, ElapsedEventArgs e) 
    { 
        Console.WriteLine("The Elapsed event was raised at {0}", e.SignalTime); 
    } 
} 
/* This code example produces output similar to the following: 
Press the Enter key to exit the program. 
The Elapsed event was raised at 5/20/2007 8:42:27 PM 
The Elapsed event was raised at 5/20/2007 8:42:29 PM 
The Elapsed event was raised at 5/20/2007 8:42:31 PM 
... 
 */ 

using System; 
using System.Threading; 
class TimerExample 
{ 
    static void Main() 
    { 
        AutoResetEvent autoEvent     = new AutoResetEvent(false); 
        StatusChecker  statusChecker = new StatusChecker(10); 
        // Create the delegate that invokes methods for the timer. 
        TimerCallback timerDelegate =  
            new TimerCallback(statusChecker.CheckStatus); 
        // Create a timer that signals the delegate to invoke  
        // CheckStatus after one second, and every 1/4 second  
        // thereafter. 
        Console.WriteLine("{0} Creating timer./n",  
            DateTime.Now.ToString("h:mm:ss.fff")); 
        Timer stateTimer =  
                new Timer(timerDelegate, autoEvent, 1000, 250); 
        // When autoEvent signals, change the period to every  
        // 1/2 second. 
        autoEvent.WaitOne(5000, false); 
        stateTimer.Change(0, 500); 
        Console.WriteLine("/nChanging period./n"); 
        // When autoEvent signals the second time, dispose of  
        // the timer. 
        autoEvent.WaitOne(5000, false); 
        stateTimer.Dispose(); 
        Console.WriteLine("/nDestroying timer."); 
    } 
} 
class StatusChecker 
{ 
    int invokeCount, maxCount; 
    public StatusChecker(int count) 
    { 
        invokeCount  = 0; 
        maxCount = count; 
    } 
    // This method is called by the timer delegate. 
    public void CheckStatus(Object stateInfo) 
    { 
        AutoResetEvent autoEvent = (AutoResetEvent)stateInfo; 
        Console.WriteLine("{0} Checking status {1,2}.",  
            DateTime.Now.ToString("h:mm:ss.fff"),  
            (++invokeCount).ToString()); 
        if(invokeCount == maxCount) 
        { 
            // Reset the counter and signal Main. 
            invokeCount  = 0; 
            autoEvent.Set(); 
        } 
    } 
} 

這兩個例子來自MSDN的網頁。