internal static async void Upload(ListItem listItem, HtmlCollection <File> files)
{
for (int i = 0; i < files.Length; i++)
{
if (!await LazyWindow.ShowWaiting(string.Format("{0}: uploading...", files[i].Name),
delegate(CancellationToken cancellationToken)
{
return(listItem.AddAttachment(UriUtility.GetFileName(files[i].Name), files[i], cancellationToken));
}))
{
break;
}
}
}