public class TrendRepo
    {
        public IEnumerable Data;
    }

    [HttpGet]
    public async Task GetTrendingRepos()
    {
        var date = DateTime.Now.AddDays(-30).ToString("yyyy-MM-ddThh:mm:ssZ");

        string trendingReposLanguagesUrl = @"https://api.github.com/search/repositories?q=created:>" + (date) + "&sort=stars&order=desc&per_page=10";

        HttpWebRequest request = WebRequest.CreateHttp(trendingReposLanguagesUrl);
        request.Accept = "application/json";
        request.UserAgent = "request";

        WebResponse response = await request.GetResponseAsync();
        Stream data = response.GetResponseStream();
        StreamReader reader = new StreamReader(data ?? throw new InvalidOperationException());
        var readerResult = await reader.ReadToEndAsync();
        //var jObj2 = JsonConvert.DeserializeObject(readerResult);
        JToken token = JObject.Parse(readerResult);
        var items = token["items"];

        var arr = new List();
        List tripDetailsCollection = new List();

        if (items != null)
        {
            foreach (dynamic o in items)
            {
                arr.Add(o.language);
                arr.Add(o.id);
                arr.Add(o.full_name);
                arr.Add(o.html_url);
                arr.Add("             ");
                tripDetailsCollection.AddRange(arr);
            }
        }
        TrendRepo trendRepo = new TrendRepo()
        {
            Data = arr,
        };
        return new JsonResult(trendRepo);

    }

which return the response like this

{
  "data": [
    "Python",
    319029846,
    "beurtschipper/Depix",
    "https://github.com/beurtschipper/Depix",
    "             ",
    "C++",
    311683390,
    "WerWolv/ImHex",
    "https://github.com/WerWolv/ImHex",
    "             ",
    null,
    316705066,
    "peng-zhihui/PocketLCD",
    "https://github.com/peng-zhihui/PocketLCD",
    "             "
  ]
}

{
  "data": [
    "Python",
    319029846,
    "full_name":[
        "beurtschipper/Depix",
        "beurtschipper/Depix",
        ],
    "https://github.com/beurtschipper/Depix",
    "             ",
    ]
    "data": [
    "C++",
    311683390,
    "full_name":[
        "beurtschipper/Depix",
        "WerWolv/ImHex",,
        ],
    "https://github.com/WerWolv/ImHex",
    "             ",
    ]
    "data": [
    null,
    316705066,
    "full_name":[
        "beurtschipper/Depix",
        "WerWolv/ImHex",,
        ],
    "https://github.com/peng-zhihui/PocketLCD",
    "             "
  ]
}