JAVASCRIPT

c# write to file in json

//if you want to use a list and add it to a file in json do this
using System.IO;
using System.Text.Json;

List<Data> data = new List<Data>();
  public void SaveData()
        {
            using (StreamWriter sw = File.CreateText("data.json"))
            {
                sw.Write(JsonSerializer.Serialize(data));
            }
        }

c# write json to file

using System.Text.Json;
using System.Text.Json.Serialization;

List<data> _data = new List<data>();
_data.Add(new data()
{
    Id = 1,
    SSN = 2,
    Message = "A Message"
});

using FileStream fileStream = File.Create(@"D:path.json");
await JsonSerializer.SerializeAsync(createStream, _data);

Write JSON file C#

using System.Text.Json;
using System.Text.Json.Serialization;

List<data> _data = new List<data>();
_data.Add(new data()
{
    Id = 1,
    SSN = 2,
    Message = "A Message"
});

string json = JsonSerializer.Serialize(_data);
File.WriteAllText(@"D:path.json", json);