从C#列表中删除重复项和原始项 [英] Remove Duplicates and Original from C# List

问题描述

我有一个自定义类型列表，如果要查找重复项，我想删除其中的重复项和原始类型.只能是一个副本.

I have a List of custom types where I want to remove the duplicate and the original if a duplicate is found. Can only be one possible duplicate.

我可以覆盖Equals和GetHashCode，然后使用Distinct，但这只会删除重复项.我需要同时删除原始文件和重复文件...任何有关优雅的想法，因此我不必使用锤子.

I can overide Equals and GetHashCode and then use Distinct but this only removes the duplicate. I need to remove both original and duplicate... Any ideas for something elegant so I don't have to use a hammer.

推荐答案

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.

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