Persistent settings for your Silverlight based WP7 apps

While hacking around with Windows Phone 7 SDK, I realized that there is no easy way to read and write simple app settings with persistent storage. So I wrote a simple class that allows you to encapsulate that behavior and simply development. Hope you find it useful.

To use it follow these steps:
1. Instantiate an object

internal static AppSettings appsettings = new
AppSettings("app_foo_bar.settings");

2. To add key-value pairs

appsettings.settings["iseasy"] = "Easy";

3. To Write to persistant storage

appsettings.WriteSettings();

4. To Read settings on app load

appsettings.ReadSettings();

5. Fetch values

string difficultyLevelSettings = appsettings.settings["iseasy"];

    public class AppSettings
    {
        internal string settingsFileName = "";
        public Dictionary settings = new Dictionary();

        public AppSettings(string filename)
        {
            this.settingsFileName = filename;
        }

        public void ReadSettings()
        {      
            using (var appStorage = IsolatedStorageFile.GetUserStoreForApplication())
            using (var file = appStorage.OpenFile(settingsFileName, FileMode.OpenOrCreate))
            {
                StreamReader sr = new StreamReader(file);
                while (sr.Peek() != -1)
                {
                    try
                    {
                        string streasy = sr.ReadLine();
                        string[] arr = streasy.Split(':');
                        settings.Add(arr[0], arr[1]);
                    }
                    catch
                    {
                    }
                }
            }
        }

        public void WriteSettings()
        {
            using (var appStorage = IsolatedStorageFile.GetUserStoreForApplication())
            using (var file = appStorage.OpenFile(settingsFileName, FileMode.OpenOrCreate))
            using (var writer = new StreamWriter(file))
            {
                foreach (var key in settings.Keys)
                {
                    writer.WriteLine(string.Format("{0}:{1}", key, settings[key]));
                }
            }
        }
    }