b
$ b

Sure you could write that:

public static class Utils {
    public static bool IsAny<T>(this IEnumerable<T> data) {
        return data != null && data.Any();
    }
}

但是，注意并非所有序列都是可重复的; 我更喜欢只走一次，以防万一。

however, be cautious that not all sequences are repeatable; generally I prefer to only walk them once, just in case.