原文地址: http://www.funsl.com/content/silverlight-%E8%87%AA%E5%AE%9A%E4%B9%89-%E9%BC%A0%E6%A0%87-%E5%8F%8C%E5%87%BB%E4%BA%8B%E4%BB%B6
public partial class MainPage : UserControl 
    { 
        public DateTime _lastClick = DateTime.Now; 
        private bool _firstClickDone = false

        public MainPage() 
        { 
            InitializeComponent(); 
            this.MouseLeftButtonDown += new MouseButtonEventHandler(MainPage_MouseLeftButtonDown); 
        } 

        private void MainPage_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) 
        { 
            UIElement element = sender as UIElement; 
            TimeSpan span = DateTime.Now - _lastClick; 

            if (span.TotalMilliseconds > 300 || _firstClickDone == false
            { 
               //第一次点击 
                _firstClickDone = true
                _lastClick = DateTime.Now; 
            } 
            else 
            { 
                 //双击触发 
                
//双击代码请在这里编写 

                _firstClickDone = false
            }            
        } 
    }

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