Question

I have a situation Where I need to remove the duplicates from the list. This is coming because I have combined some lists togather.

List<Guid> CompleteListOfPeople = firstListGuids.Union(secondListGuids).ToList().Union(thirdListGuids).ToList();

What should I do to filer the list of Guids so that I get only unique Guids?

Thank you

Answer 1

Union should already give you unique values. Note that you don’t need the intermediate ToList() call. Just:

List<Guid> completeListOfPeople = firstListGuids.Union(secondListGuids).
                                                .Union(thirdListGuids)
                                                .ToList();