title: Stream image to file from SavePicker in Windows 8
body: <p>I need to save Image from Local Storage Folder to file selected from SavePicker.
  Should I use stream?
  Here is my code:</p>
  
  <pre><code>            StorageFile file = await savePicker.PickSaveFileAsync();
              if (null != file)
              {
                  var localFolder = Windows.Storage.ApplicationData.Current.LocalFolder;
                  StorageFile current_photo = await localFolder.GetFileAsync(img.Tag.ToString());
  
                  // TODO Stream from current_photo to file
              }
  </code></pre>