Linq To Entity 多表联合查询

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

namespace LinqToEntity
{
    class Program
    {
        static void Main(string[] args)
        {
            //点击项目右键-添加->新建项->ADO.NET实体数据模型，然后..选择你需要的表，点击完成。这里我选择是数据库是sales表的名字是xs，xs_kc默认生成了一个实体容器名称 salesEntities
            
            salesEntities salesEn = new salesEntities();

            var result = from xs in salesEn.xs
                         from xs_kc in salesEn.xs_kc
                      
                         where string.Equals(xs_kc.课程号, "206")
                                && xs_kc.成绩 > 80
                                && xs.学号 == xs_kc.学号
                               
                         select new
                        {
                            xs.姓名,
                            xs_kc.成绩
                        };

            foreach (var item in result)
            {
                Console.WriteLine(item.姓名 + ":" + item.成绩);
            }


            Console.ReadLine();


        }
    }
}