Sending List in http request in C#

I’m trying to send List (of strings) as http request to a flask python backend but I cant figure how to parse the list into json format to send that

I tryed this:

var myObject = (dynamic)new JsonObject();
myObject.List = new List<string>();
// add items to your list

according to this: C# HTTP post , how to post with List<XX> parameter?
but It’s says that List isn’t recognized.
any help or other method to do this?

>Solution :

please prefer this Microsoft documentation.

https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/how-to?pivots=dotnet-7-0

using System.Text.Json;

namespace SerializeToFile
{
public class WeatherForecast
{
    public DateTimeOffset Date { get; set; }
    public int TemperatureCelsius { get; set; }
    public string? Summary { get; set; }
}

public class Program
{
    public static void Main()
    {
        var weatherForecast = new WeatherForecast
        {
            Date = DateTime.Parse("2019-08-01"),
            TemperatureCelsius = 25,
            Summary = "Hot"
        };

        string fileName = "WeatherForecast.json"; 
        string jsonString = JsonSerializer.Serialize(weatherForecast);
        File.WriteAllText(fileName, jsonString);

        Console.WriteLine(File.ReadAllText(fileName));
    }
}
}
// output:
//{"Date":"2019-08-01T00:00:00- 
07:00","TemperatureCelsius":25,"Summary":"Hot"}