public void ExecuteFilterPodcastCommand(string text)
{
text = text.ToLower();
FilteredPodcasts.Clear();
var filtered = Podcasts.Where(podcast =>
podcast.Description.ToLower().Contains(text) || podcast.Name.ToLower().Contains(text));
foreach (var cast in filtered)
{
FilteredPodcasts.Add(cast);
}
OnPropertyChanged("FilteredPodcasts");
}