这就是设置的内容(例如， SetEquals 验证集合和另一个集合是否包含相同的元素.

That's what sets (e.g., HashSet<T>) are for. Sets have no defined order, and SetEquals verifies whether the set and another collection contain the same elements.

var set = new HashSet<int>(list1);
var equals = set.SetEquals(list2);