目录1. 委托内部结构2. Lambda 表达式转换为委托实例2.1 不捕获任何外部数据2.2 捕获实例成员（通过 this 访问）2.3 捕获非实例成员（例如局部变量）3. 委托实例的订阅与生命周期3.1 常规委托/事件订阅3.2 弱事件订阅
How to handle the case where the token \'for\' is used in two different situations in the language to parse? Such as statement and as a \"parameter\" as the following example:
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