public void Filter()
{
if (searchName == null)
{
searchName = string.Empty;
}
var result = ProfessorsLocal.Where(p => p.Name.ToLowerInvariant().Contains(SearchName.ToLowerInvariant()))
.ToList();
if (result != null)
{
var remove = Professors.Except(result).ToList();
remove.ForEach(r =>
{
Professors.Remove(r);
});
}
for (int index = 0; index < result.Count; index++)
{
var item = result[index];
if (index + 1 > Professors.Count || !Professors[index].Equals(item))
{
Professors.Insert(index, item);
}
}
}
