C# 2.0 規格：匿名方法 (二-4) - 實作範例：多層作用域捕獲

多層作用域捕獲實作

巢狀作用域各自產生封裝類別，子層引用父層封裝類別實例：

class Test
{
    void F()
    {
        int y = 123;
        for (int i = 0; i < 10; i++)
        {
            int z = i * 2;
            D d = delegate { Console.WriteLine(x + y + z); };
        }
    }
}

編譯器產生結構

class __Locals1 { public Test __this; public int y; }
class __Locals2 { public __Locals1 __locals1; public int z; public void __Method1() { Console.WriteLine(__locals1.__this.x + __locals1.y + z); } }

外層 __Locals1 捕獲 this 與 y；內層 __Locals2 捕獲 z 並引用 __Locals1。