Adding an item to an object in a list with foreach

I’m designing a web api and I’m trying to add the fields you can see in the following class inside an object named Data.

public partial class DataResponse
{
    [JsonPropertyName("data")]
    public List<Kullanicilar> Data { get; set; } = null!;
}

public partial class Kullanicilar
{
    [JsonPropertyName("id")]
    public int KullaniciId { get; set; }

    [JsonPropertyName("ad_soyad")]
    public string AdSoyad { get; set; } = null!;

    [JsonPropertyName("il")]
    public string Il { get; set; } = null!;

    [JsonPropertyName("ilce")]
    public string Ilce { get; set; } = null!;

    [JsonPropertyName("eposta")]
    public string Eposta { get; set; } = null!;

    [JsonPropertyName("telefon")]
    public string Telefon { get; set; } = null!;

    [JsonPropertyName("kart")]
    public string Kart { get; set; } = null!;

    [JsonPropertyName("rfid")]
    public string Rfid { get; set; } = null!;

    [JsonPropertyName("durum")]
    public byte Durum { get; set; }
}

But I don’t know how to add every data from database to these list elements. I want to add items to the users list under the data object. I want every record to be saved in this list with a foreach logic.

My Controller Code:

public IActionResult Get()
        {
            var data = db.Kullanicilars.ToList();

            var result = new DataResponse()
            {
            Data = new List<Kullanicilar>()
                {
            new Kullanicilar()
            {
            KullaniciId = 1,
            AdSoyad = "",
            Il = "",
            Ilce = "",
            Eposta = "",
            Telefon = "",
            Kart = "",
            Rfid = "",
            Durum = 1
        },

    }
            };
            return Json(result);
        }
    }

.net core list problem

>Solution :

you can run a loop and add each item to the list like this.

var result = new DataResponse();
result.Data = new List<Kullanicilar>();
foreach (var item data)
{
    result.Data.Add(new Kullanicilar()
    {
        KullaniciId = item.KullaniciId,
        AdSoyad = item.AdSoyad,
        Il = item.Il,
        Ilce = item.Ilce,
        Eposta = item.Eposta,
        Telefon = item.Telefon,
        Kart = item.Kart,
        Rfid = item.Rfid,
        Durum = item.Durum
    });
}
return Json(result);