[Solved] How do I get equal and not equal value between two list using Linq lambda expression

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Enumerable.Intersect can give you the IDs that occur in both lists. e.g.

id_list.Select(x => x.ID.ToString()).Intersect(ListID)

Enumerable.Except can give you the IDs in the first list that do not occur in the second. e.g.

ListID.Except(id_listSelect(x => x.ID.ToString())

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solved How do I get equal and not equal value between two list using Linq lambda expression