LINQ 学习路程 -- 查询操作 ThenBy & ThenByDescending

IList<Student> studentList = new List<Student>() {
    new Student() { StudentID = , StudentName = "John", Age =  } ,
    new Student() { StudentID = , StudentName = "Steve",  Age =  } ,
    new Student() { StudentID = , StudentName = "Bill",  Age =  } ,
    new Student() { StudentID = , StudentName = "Ram" , Age =  } ,
    new Student() { StudentID = , StudentName = "Ron" , Age =  },
    new Student() { StudentID = , StudentName = "Ram" , Age =  }
};
var thenByResult = studentList.OrderBy(s => s.StudentName).ThenBy(s => s.Age);

var thenByDescResult = studentList.OrderBy(s => s.StudentName).ThenByDescending(s => s.Age);