我想使用LINQ TakeWhile 函数LINQ到对象。不过，我也需要知道，爆发的功能，即第一个元素，其中的条件是不正确的第一个元素。

I'd like to use the LINQ TakeWhile function on LINQ to Objects. However, I also need to know the first element that "broke" the function, i.e. the first element where the condition was not true.

有一个函数来获取所有不匹配的对象，加上第一次的呢？

Is there a single function to get all of the objects that don't match, plus the first that does?

例如，给定一组 {1,2,3,4,5} ，

mySet.MagicTakeWhile(x => x != 5);

=＆GT; {1,2,3,4,5}

推荐答案

我想你可以使用 Sk​​ipWhile < /一>，然后采取的第一要素。

I think you can use SkipWhile, and then take the first element.

var elementThatBrokeIt = data.SkipWhile(x => x.SomeThing).Take(1);

更新

如果你想有一个单一的扩展方法，你可以使用以下命令：

If you want a single extension method, you can use the following:

public static IEnumerable<T> MagicTakeWhile<T>(this IEnumerable<T> data, Func<T, bool> predicate) {
    foreach (var item in data) {
        yield return item;
        if (!predicate(item))
            break;
    }
    yield break;
}