public void SortByName()
{
   studentList.Sort((b1, b2) => string.Compare(b1.Name, b2.Name));
}

int Comparison<in T>(T x, T y)

public class Student
{
    public int Age { get; set; }

    public string Name { get; set; }
}
var result = students.OrderBy(student =>student.Name).ThenBy(student => student.Age).ToArray();