lambda表达式的出现基本上取代了delegate操作符的使用

public MainWindow()        {            InitializeComponent();            this.button1.Click += button1_Click;        }        void button1_Click(object sender, RoutedEventArgs e)        {            this.textbox1.Text = "hello world";        }

使用delegate转变为匿名方法

public MainWindow()        {            InitializeComponent();            this.button1.Click += delegate(object sender, RoutedEventArgs e)            {                this.textbox1.Text = "hello world";            };        }

使用lambda表达式转变为

public MainWindow()        {            InitializeComponent();            this.button1.Click += ( sender,  e)=>            {                this.textbox1.Text = "hello world";            };        }