internal void Sort(PropertyModel model)
{
PropertyViewModel prop = SortProperties.Find(p => p.Data == model);
IEnumerable <SortDescription> result =
Books.SortDescriptions.Cast <SortDescription>().Where(p => p.PropertyName == prop.Data.FullName);
if (result != null && result.Count() == 1)
{
Books.SortDescriptions.Remove(result.First());
}
else
{
Books.SortDescriptions.Add(new SortDescription(prop.Data.FullName, ListSortDirection.Ascending));
}
RaisePropertyChanged("Books");
}
