如果您需要的是关于lineVar是否存在于数组的任何字符串中的布尔型真/假答案，请使用以下方法:>

If all you need is a bool true/false answer as to whether the lineVar exists in any of the strings in the array, use this:

 arrayStrings.Any(s => s.Contains(lineVar));

如果您需要索引，那会有点棘手，因为它可以出现在数组的多个项目中.如果您不想要布尔，可以解释您的需求吗?

If you need an index, that's a bit trickier, as it can occur in multiple items of the array. If you aren't looking for a bool, can you explain what you need?