我需要一个HashSet的是preserves插入排序，还有这实现任何框架中的？

I need a HashSet that preserves insertion ordering, are there any implementations of this in the framework?

推荐答案

您可以用得到这个功能，很容易 KeyedCollection＆LT; TKEY的，TItem＆GT; 指定相同类型参数TKEY的和TItem：

You can get this functionality easily using KeyedCollection<TKey,TItem> specifying the same type argument for TKey and TItem:

public class OrderedHashSet<T> : KeyedCollection<T, T>
{
    protected override T GetKeyForItem(T item)
    {
        return item;
    }
}