c# - 这是唯一指向无法访问标签的可访问 goto 的情况吗？

Question

灵感来自问题

• What is a non-reachable end point(unreachable endpoint) of a statement?

在我问这个问题之前，我读过:

• C# Puzzle : Reachable goto pointing to an unreachable label
• Why does this "finally" execute?

题目中的挑战是

write a program which has a reachable goto statement but the corresponding labelled statement is unreachable - Eric Lippert

一个可行的答案是

    // the 3 lines are not important but declare variable for afterwards use
    var whateverException=new Exception("whatever exception");
    var whateverAction=default(Action);
    whateverAction=() => whateverAction();

    try {
        goto whateverLabel; // (1) the goto is reachable
    }
    finally {
        throw whateverException; // (3) because finally hijacks
    }

whateverLabel: // (2) but the label is not really reached
    whateverAction();

我想知道在单线程程序中，是不是只有一个可达的goto指向一个不可到达的标签？以下代码是否也被认为是可行的答案？

here:
    int d=0, n=1/d;
    goto here;

Answer 1

finally-blocked goto 技巧实际上是获得针对不可到达标签的可到达 goto 的唯一方法。