public void Add_Success()
 {
     var cache = new IsolatedStorageCache<string, byte[]>(s => s, k => k, b => b, b => b);
     cache.Save("string to be deleted",new byte[] {1, 2, 3, 5});
     cache.Save("string not to be deleted", new byte[] { 1, 2, 3, 5 });
     List<KeyValuePair<string, byte[]>> values = cache.GetAll().ToList();
     Assert.AreEqual(2, values.Count);
 }