private async Task PrepareSearch()
{
await PrepareDirectories();
if (Searches == null || !Searches.Any())
{
SelectedSearches = Enumerable.Empty <NewMediaViewModel>();
}
else
{
var selectedList = Searches.Where(s => s.IsSelected).ToList();
var t = Task.WhenAll(selectedList.RunTasks(s => s.InitSearch(), _exceptionHandler));
SelectedSearches = selectedList;
await t;
}
}
