Remove all duplicates from a list

Questions & Answers
1

Feeling dumb, but I couldn’t find an answer here or the forums.

I have a list of gameobjects and I want to remove all occurrences of a specific gameobject from that list. I’ve played around using RemoveAll() and ForEach loops, but no luck so far.

To illustrate my request:

List<GameObject> testList = new List<GameObject>();
testList.Add (obj1);
testList.Add (obj1);
testList.Add (obj2);
testList.Add (obj3);

What I would like to be able to do, for example, is to remove all occurrences of obj1 from testList. The testList should then only return obj2 and obj3.

2

You should be able to use RemoveAll() like this:

list.RemoveAll(obj => obj == objToDelete);

It works for me in Unity… here’s my sample console output:

>  List<String> list = new List<String> {"a","b","b","c"};
>  String.Join(",", list.ToArray());
a,b,b,c
>  list.RemoveAll(obj => obj == "b");
2
>  String.Join(",", list.ToArray());
a,c

Edit: updated to the corrected answer from the comments below.