您可以使用 GroupBy ，然后使用 Where(g => g.Count()== 1)过滤掉所有重复的记录:

You can use GroupBy, followed by Where (g => g.Count() == 1) to filter out all records that have duplicates:

var res = orig.GroupBy(x => x).Where(g => g.Count() == 1).Select(g => g.Key);

为此，您仍然需要覆盖 GetHashCode 和 Equals .

In order for this to work, you still need to override GetHashCode and Equals.