IsolatedStorageController.cs

    public static class IsolatedStorageController
    {
        private static readonly JsonSerializer Serializer;
        private static readonly IsolatedStorageScope Scope;
        private static readonly Type DomainEvidenceType;
        private static readonly Type AssemblyEvidenceType;

        static IsolatedStorageController()
        {
            Serializer = new JsonSerializer();
            //Serializer.Converters.Add(new JavaScriptDateTimeConverter());
            //Serializer.NullValueHandling = NullValueHandling.Ignore;
            Scope = IsolatedStorageScope.User |
                    IsolatedStorageScope.Assembly |
                    IsolatedStorageScope.Domain;
            DomainEvidenceType = typeof (System.Security.Policy.Url);
            AssemblyEvidenceType = typeof(System.Security.Policy.Url);
        }
    
        public static void AddOrUpdate(string fileName, object data)
        {
            using (var store = IsolatedStorageFile.GetStore(Scope, DomainEvidenceType, AssemblyEvidenceType))
            {
                if (store.FileExists(fileName))
                    store.DeleteFile(fileName);

                using (var sw = new StreamWriter(store.CreateFile(fileName)))
                using (JsonWriter jw = new JsonTextWriter(sw))
                {
                    Serializer.Serialize(jw, data);
                }
            }
        }

        public static object Get(string fileName)
        {
            using (var store = IsolatedStorageFile.GetStore(Scope, DomainEvidenceType, AssemblyEvidenceType))
            {
                if (!store.FileExists(fileName)) return null;

                using (var sr = new StreamReader(store.OpenFile(fileName, FileMode.Open)))
                using (var jr = new JsonTextReader(sr))
                {
                    return Serializer.Deserialize(jr);
                }
            }
        }

        public static T Get<T>(string fileName)
        {
            using (var store = IsolatedStorageFile.GetStore(Scope, DomainEvidenceType, AssemblyEvidenceType))
            {
                using (var sr = new StreamReader(store.OpenFile(fileName, FileMode.Open)))
                using (var jr = new JsonTextReader(sr))
                {
                    return Serializer.Deserialize<T>(jr);
                }
            }
        }

        public static void Remove(string fileName)
        {
            using (var store = IsolatedStorageFile.GetStore(Scope, DomainEvidenceType, AssemblyEvidenceType))
            {
                if (!store.FileExists(fileName)) return;
                store.DeleteFile(fileName);
            }
        }

        public static void RemoveAll()
        {
            using (var store = IsolatedStorageFile.GetStore(Scope, DomainEvidenceType, AssemblyEvidenceType))
            {
                store.Remove();
            }
        }
    }