public StudentsRepository(RepositoryFilter filter, RepositorySorter sorter)
{
this.filter = filter;
this.sorter = sorter;
studentsByCourse = new Dictionary <string, Dictionary <string, List <int> > >();
}
public StudentRepository(RepositorySorter sorter, RepositoryFilter filter)
{
this.filter = filter;
this.sorter = sorter;
}