Distinct() does not work in the game, what should I do?

Question

C++ / C#

In the unity emulator, this function removes duplicates, and when assembling in the game, he does not want to remove

public Dropdown dd;
    Resolution[] res;
    

    void Start()
    {
        Resolution [] resolution = Screen.resolutions;
        res = resolution.Distinct().ToArray();

        string[] strRes = new string[res.Length];
        for (int i = 0; i < res.Length; i++)
        {
            strRes[i] = res[i].width.ToString() + "x" + res[i].height.ToString();
        }
        dd.AddOptions(strRes.ToList());
    }

Screenshot from the emulator:


From the game:

Answer 1

Try to do something like this (only instead of ResolutionName the correct property name)

Screen.resolutions.Select(x => x.ResolutionName).Distinct();

Maybe your other item properties are different, and therefore does not work correctly.
Well, check it out:
https://www.codeproject.com/Questions/748930/Disti...
https://stackoverflow.com/questions/1365748/distin...