ASP.NET Core 6 : server returning proper array length but empty data

Question

I am using ASP.NET Core 6. I have a controller that is returning the proper number of items in the array, however the objects themselves are empty.

ChartController.cs

[ApiController]
public class ChartController : ControllerBase
{
    [HttpGet]
    [Route("charts/{symbol:alpha}")]
    public IEnumerable<ChartDataOhlc> GetChartData(string symbol)
    {
        List<ChartDataOhlc> data = new List<ChartDataOhlc>()
        {
            new() { DateTime = DateTime.Now, Open = "1", High = "5", Low = "0", Close = "4" },
            new() { DateTime = DateTime.Now, Open = "1", High = "5", Low = "0", Close = "4" },
            new() { DateTime = DateTime.Now, Open = "1", High = "5", Low = "0", Close = "4" },
            new() { DateTime = DateTime.Now, Open = "1", High = "5", Low = "0", Close = "4" },
            new() { DateTime = DateTime.Now, Open = "1", High = "5", Low = "0", Close = "4" },
        };

        // list2.Add(new Test() { A = 1, B = "B1" });
        return (data);
    }
}

ChartDataOhlc.cs

public class ChartDataOhlc
{
    public DateTime DateTime;
    public string Open = null!;
    public string High = null!;
    public string Low = null!;
    public string Close = null!;
}

But all I'm getting is [{},{},{},{},{}]

Answer 1

Replace ChartDataOhlc class fields with properties like :

public class ChartDataOhlc
{
    public DateTime DateTime {get; set;}
    public string Open {get; set;} = null!;
    public string High {get; set;} = null!;
    public string Low {get; set;} = null!;
    public string Close {get; set;} = null!;
}