✅ Learning C# through console app

// Program.cs
using PhasmoTriviaConsole.Services;

namespace PhasmoTriviaConsole;

class Program
{
    private Database _db;
    public Program(Database db)
    {
        _db = db;
        UserInfo UserName = new UserInfo(db.LoadUser());
    }

    public string UserName { get; set; }
}

// /Services/Database.cs
using System.Text.Json;

namespace PhasmoTriviaConsole.Services;

internal class Database
{
    private const string dbFile = "user.json";

    public UserInfo LoadUser()
    {
        if (File.Exists(dbFile))
        {
            var dbInfo = File.ReadAllText(dbFile);
            UserInfo info = JsonSerializer.Deserialize<UserInfo>(dbInfo);
            return info;
        }
        else
        {
            return new UserInfo();
        }
    }

    public void SaveUser(UserInfo info)
    {
        var content = JsonSerializer.Serialize(info);
        File.WriteAllText(dbFile, content);
    }
}

// /Models/UserModel.cs
namespace PhasmoTriviaConsole;

public class UserInfo
{
    public string Username { get; set; }
    public string Email { get; set; }
    public string Password { get; set; }
    public string DOB { get; set; }
}