C#

cmbClassId.SelectedValue = (object)dataSet.Tables[Constants.STUDENT].Rows[0]["StudentClassId"];

class Student : IComparable
{
    public int id;
    public int grade;
    public string studentName;

    //IComparable Members
    public int CompareTo(object obj)
    {
        Student std = (Student)obj;
        return std.grade - this.grade;
    }

}


  //return the best 10 stduent
    public SortedList GetTheBest10Student()
    {
        SortedList sortList = new SortedList();

        for (int i = 0; i < StudentNumber; i++)
        {
            Student std = GetThisStudent(i);
            sortList.Add(i, std);
            if (sortList.Count > 10)
                sortList.RemoveAt(10);
        }

        return sortList;
    }