使用Linq将列表分组到子列表

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        // 假设有一个包含学生信息的列表
        List<Student> students = new List<Student>
        {
            new Student { Name = "张三", Grade = "一年级" },
            new Student { Name = "李四", Grade = "二年级" },
            new Student { Name = "王五", Grade = "一年级" },
            new Student { Name = "赵六", Grade = "三年级" },
            new Student { Name = "钱七", Grade = "二年级" }
        };

        // 使用Linq将学生列表按照年级进行分组
        var groupedStudents = students.GroupBy(s => s.Grade);

        // 遍历每个分组，并输出分组信息和学生列表
        foreach (var group in groupedStudents)
        {
            Console.WriteLine("年级: " + group.Key);
            Console.WriteLine("学生列表:");
            foreach (var student in group)
            {
                Console.WriteLine(student.Name);
            }
            Console.WriteLine();
        }
    }
}

class Student
{
    public string Name { get; set; }
    public string Grade { get; set; }
}