public async void Add(IHistoryProvider _historyProvider)
{
_cache = new List <StorageFile>(_maxCapacity);
int currentIndex = _historyProvider.Index;
if (_historyProvider.Index == _historyProvider.Count - 1)
{
_cache.Add(_historyProvider.PreviousFile().Result);
_cache.Add(_historyProvider.NextFile().Result);
}
if (_historyProvider.Index == 0)
{
_cache.Add(_historyProvider.CurrentFile().Result);
_cache.Add(_historyProvider.NextFile().Result);
}
else
{
_cache.Add(_historyProvider.PreviousFile().Result);
_cache.Add(_historyProvider.NextFile().Result);
_cache.Add(_historyProvider.NextFile().Result);
}
_historyProvider.Index = currentIndex;
}
