匿名方法给我们带来了方便，那么如何增加删除匿名方法中附加的委托（事件）呢
一般写法：
|---------|----------------------------------------------------------------------|
| 1 2 3 4 | this``.Loaded += (sender, e) => ``{ ``//Do something ``}; |
进化写法：
|---------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1 2 3 4 5 6 7 | this``.Loaded += ``new RoutedEventHandler(FormulaAssign_Loaded); void FormulaAssign_Loaded(``object sender, RoutedEventArgs e) ``{ ``this``.Loaded -= ``new RoutedEventHandler(FormulaAssign_Loaded); ``//do something ``} |
优化写法：
|---------|--------------------------------------------------------------------------------------------------------------------------------|
| 1 2 3 4 | RoutedEventHandler eventHander = ``null``; eventHander = (``object sender, RoutedEventArgs e) => { ``//do something |
|-------|-------------------------------------------------------------------------|
| 1 2 3 | ``this``.Loaded -= eventHander; }; this``.Loaded += eventHander; |