将两个表连接成一个表的C# Linq查询？

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

public class Program
{
    public static void Main()
    {
        // 创建两个示例表
        List<Student> students = new List<Student>()
        {
            new Student { Id = 1, Name = "Alice", Age = 20 },
            new Student { Id = 2, Name = "Bob", Age = 22 },
            new Student { Id = 3, Name = "Charlie", Age = 21 }
        };

        List<Grade> grades = new List<Grade>()
        {
            new Grade { StudentId = 1, Course = "Math", Score = 90 },
            new Grade { StudentId = 2, Course = "English", Score = 85 },
            new Grade { StudentId = 3, Course = "Science", Score = 95 }
        };

        // 使用Join操作符将两个表连接起来
        var query = from student in students
                    join grade in grades on student.Id equals grade.StudentId
                    select new
                    {
                        student.Name,
                        grade.Course,
                        grade.Score
                    };

        // 打印查询结果
        foreach (var result in query)
        {
            Console.WriteLine($"Name: {result.Name}, Course: {result.Course}, Score: {result.Score}");
        }
    }
}

public class Student
{
    public int Id { get; set; }
    public string Name { get; set; }
    public int Age { get; set; }
}

public class Grade
{
    public int StudentId { get; set; }
    public string Course { get; set; }
    public int Score { get; set; }
}