ADO.NET Entity Framework，Cold First简单示例

    class Student
    {
        public int id { get; set; }//ID
        public string name { get; set; }//姓名
        public byte age { get; set; }//年龄
    }

using System.Data.Entity;//引用Entity Framework


namespace Sql
{
    class StudentContext:DbContext
    {
        public StudentContext() : base(@"Data Source=MYPC\MSSQLSERVER;Initial Catalog=entitycodefirst;User ID=sa;Password=123456") { }
        public DbSet<Student> Students { get; set; }
    }
}

using System;

namespace Sql
{
    class Program
    {
        static void Main(string[] args)
        {
            //保存
            using (var data=new StudentContext())
            {
                var student1 = data.Students.Create();//创建一个学生的对象
                student1.name = "小曼";
                student1.age = 15;
                data.Students.Add(student1);//将学生对象加入学生表中


                var student2 = data.Students.Create();
                student2.name = "小红";
                student2.age = 15;
                data.Students.Add(student2);


                data.SaveChanges();//保存进数据库里
            }

            //读取

            using (var data = new StudentContext())
            {
                foreach (var item in data.Students)
                {
                    Console.WriteLine("ID:{0},姓名:{1},年龄:{2}",item.id,item.name,item.age);
                }
            }
            Console.ReadKey(true);
        }

    }
}