private async Task LoadAllGroups()
{
var existing = await LoadCachedGroups();
var live = await LoadLiveGroups();
foreach (var liveGroup in live
.Where(liveGroup => !existing.Contains(liveGroup, new BaseItemComparer())))
{
existing.Add(liveGroup);
await _storage.SaveItem(GROUP_FOLDER, liveGroup);
}
foreach (var group in existing.OrderBy(e => e.Title))
{
GroupList.Add(group);
}
}