与Monitor.Enter(对象)相比,Monitor.Enter(object,ref bool)的优势是什么？

Question

根据语言规范lock(obj) statement;将编译为:

object lockObj = obj; // (the langspec doesn't mention this var, but it wouldn't be safe without it)
Monitor.Enter(lockObj);
try
{
    statement;
}
finally
{
    Monitor.Exit(lockObj);
}

但是,编译为:

try
{
    object lockObj = obj;
    bool lockTaken = false;
    Monitor.Enter(lockObj, ref lockTaken);
    statement;
}
finally
{
    if (lockTaken) Monitor.Exit(lockObj);
}

这似乎比必要的要复杂得多.所以问题是,该实施的优势是什么？

Answer 1

一如既往,Eric Lippert已经回答了这个问题:

编码中的精彩冒险:锁和异常不会混合