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private void OnRestoreClicked(オブジェクト送信者, RoutedEventArgs e) {

        string id = string.Empty;
        client.GetCompleted += (obj, args) =>
        {
            List<object> items = args.Result["data"] as List<object>;
            foreach (object item in items)
            {
                Dictionary<string, object> file = item as Dictionary<string, object>;
                if (file["name"].ToString() == "Expensemanager.bak")
                {
                    id = file["id"].ToString();
                }
            }

            client.DownloadCompleted += (o, a) =>
            {
                Stream stream = a.Result;

                using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
                {    
                         var fileToSave = new IsolatedStorageFileStream("expanseManager.sdf", FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None, storage);

                        stream.CopyTo(fileToSave);
                        stream.Flush();
                        stream.Close();

                }
            };

            client.DownloadAsync(string.Format("{0}/content", id));
        };

        client.GetAsync("me/skydrive/files");
    }

この下の行にエラーがあります...隔離されたストレージでは操作が許可されていません..

var fileToSave = new IsolatedStorageFileStream("expanseManager.sdf", FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None, storage);

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