MossyUpdater/Services/SettingsService.cs

using System.IO;
using System.Text.Json;

namespace MossyUpdater.Services
{
    public class SettingsService : ISettingsService
    {
        private readonly string _settingsPath;

        public SettingsService()
        {
            var appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
            var appFolder = Path.Combine(appDataPath, "MossyUpdater");
            Directory.CreateDirectory(appFolder);
            _settingsPath = Path.Combine(appFolder, "settings.json");
        }

        public async Task<AppSettings> LoadSettingsAsync()
        {
            try
            {
                if (!File.Exists(_settingsPath))
                    return new AppSettings();

                var json = await File.ReadAllTextAsync(_settingsPath);
                var settings = JsonSerializer.Deserialize<AppSettings>(json);
                return settings ?? new AppSettings();
            }
            catch
            {
                return new AppSettings();
            }
        }

        public async Task SaveSettingsAsync(AppSettings settings)
        {
            try
            {
                var json = JsonSerializer.Serialize(settings, new JsonSerializerOptions 
                { 
                    WriteIndented = true 
                });
                await File.WriteAllTextAsync(_settingsPath, json);
            }
            catch
            {
            }
        }
    }
}