造轮子：c#删除 list中的元素

for (int i = list.Count - 1; i >= 0; i--)
{
if (list[i].NO == item.NO)
{
list.RemoveAt(i);
}
}

public void RemoveItemFromList(ref List <A> list, A item)
{
List <A> tempList = new List <A>();
foreach (A a in list)
{
if (a.NO != item.NO && !tempList.Contains(a))
tempList.Add(a);
}
list = tempList;
}