是否可以使用linq GroupBy一组值？

var students = new List<Student>
{
    new Student { Name = "Tom", Age = 18, Grade = "A" },
    new Student { Name = "Jerry", Age = 19, Grade = "B" },
    new Student { Name = "Alice", Age = 20, Grade = "A" },
    new Student { Name = "Bob", Age = 21, Grade = "B" },
    new Student { Name = "Cathy", Age = 22, Grade = "A" }
};

var groupedStudents = students.GroupBy(s => s.Grade);

foreach (var group in groupedStudents)
{
    Console.WriteLine($"Grade: {group.Key}");
    foreach (var student in group)
    {
        Console.WriteLine($"  Name: {student.Name}, Age: {student.Age}");
    }
}

Grade: A
  Name: Tom, Age: 18
  Name: Alice, Age: 20
  Name: Cathy, Age: 22
Grade: B
  Name: Jerry, Age: 19
  Name: Bob, Age: 21