private async void SaveFileTokensAsync()
{
try
{
var tokens = OpenDocuments.Where(i => i.Token != null).Select(i => i.Token).ToArray();
var file = await ApplicationData.Current.LocalCacheFolder.CreateFileAsync("Files.dat", CreationCollisionOption.ReplaceExisting);
await FileIO.WriteLinesAsync(file, tokens);
}
catch { }
}
