Remove objects with a duplicate property from List

Question

I have a List of objects in C#. All of the objects contain a property ID. There are several objects that have the same ID property.

How can I trim the List (or make a

Answer 1

Not sure if anyone is still looking for any additional ways to do this. But I've used this code to remove duplicates from a list of User objects based on matching ID numbers.

private ArrayList RemoveSearchDuplicates(ArrayList SearchResults)
{
    ArrayList TempList = new ArrayList();

    foreach (User u1 in SearchResults)
    {
        bool duplicatefound = false;
        foreach (User u2 in TempList)
            if (u1.ID == u2.ID)
                duplicatefound = true;

        if (!duplicatefound)
            TempList.Add(u1);
    }
    return TempList;
}

Call: SearchResults = RemoveSearchDuplicates(SearchResults);