Windows8 FileOpenPicker && FolderPicker

        private async void PickAFileButton_Click(object sender, RoutedEventArgs e)
        {
            FileOpenPicker openPicker = new FileOpenPicker();
            openPicker.ViewMode = PickerViewMode.List;
            openPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
            openPicker.FileTypeFilter.Add(".jpg");
            openPicker.FileTypeFilter.Add(".jpeg");
            openPicker.FileTypeFilter.Add(".png");
            StorageFile file = await openPicker.PickSingleFileAsync();
            if (file != null)
            {
                //Application now has read/write access to the picked file
                using (IRandomAccessStream fileStream = await file.OpenAsync(FileAccessMode.Read))
                {
                    BitmapImage bitmapImage = new BitmapImage();// Set the image source to the selected bitmap
                    bitmapImage.SetSource(fileStream);

                    this.Image.Source = bitmapImage;
                    this.Image.Visibility = Visibility.Visible;
                }
            }
        }


        private async void PickFilesButton_Click(object sender, RoutedEventArgs e)
        {
                FileOpenPicker openPicker = new FileOpenPicker();
                openPicker.ViewMode = PickerViewMode.List;
                openPicker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
                openPicker.FileTypeFilter.Clear();// Filter to include a sample subset of file types
                openPicker.FileTypeFilter.Add("*");

                IReadOnlyList files = await openPicker.PickMultipleFilesAsync();
                if (files.Count > 0)
                {
                    StringBuilder output = new StringBuilder("Picked Files:\n");
                    foreach (StorageFile file in files)
                    {
                        output.Append(file.Name + "\n");
                    }
                    this.OutputTextBlock.Text = output.ToString();
                }
        }



        private async void PickFolderButton_Click(object sender, RoutedEventArgs e)
        {
                // Clear previous returned folder name, if it exists, between iterations of this scenario
                FolderPicker folderPicker = new FolderPicker();
                folderPicker.SuggestedStartLocation = PickerLocationId.Desktop;
                folderPicker.FileTypeFilter.Add(".docx");
                folderPicker.FileTypeFilter.Add(".xlsx");
                folderPicker.FileTypeFilter.Add(".pptx");
                StorageFolder folder = await folderPicker.PickSingleFolderAsync();
                if (folder != null)
                {
                    //Application now has read/write access to all contents in the picked folder (including other sub-folder contents)
                    StorageApplicationPermissions.FutureAccessList.AddOrReplace("PickedFolderToken", folder);
                    this.OutputTextBlock.Text = "Picked folder: " + folder.Name;
                }        
        }



        private async void SaveFileButton_Click(object sender, RoutedEventArgs e)
        {
            FileSavePicker savePicker = new FileSavePicker();
            savePicker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
            // Dropdown of file types the user can save the file as
            savePicker.FileTypeChoices.Add("Plain Text", new List() { ".txt" });
            // Default file name if the user does not type one in or select a file to replace
            savePicker.SuggestedFileName = "New Document";
            StorageFile file = await savePicker.PickSaveFileAsync();
            if (file != null)
            {
                CachedFileManager.DeferUpdates(file);

                await FileIO.WriteTextAsync(file, "Hello World");

                FileUpdateStatus status = await CachedFileManager.CompleteUpdatesAsync(file);
                if (status == FileUpdateStatus.Complete)
                {
                    this.OutputTextBlock.Text = "File " + file.Name + " was saved.";
                }
                else
                {
                    this.OutputTextBlock.Text = "File " + file.Name + " couldn't be saved.";
                }
            }
        }