using (IDbConnection connection = new SqlConnection("server=.;database=Test;uid=sa;pwd=123456")){

　　　　　　　　　　　//通过connection.Execute（sql，object）方法执行增删改//UserInfo userInfo = new UserInfo();//userInfo.Id = Guid.NewGuid();//userInfo.UserName = "aa";//userInfo.Name = "张三";//string sql = "insert into UserInfo values(@id,@userName,@name)";//connection.Execute(sql, userInfo);//connection.Execute(sql, new//{//    Id = Guid.NewGuid(),//    UserName = "bb",//    Name = "张三1"//});//UserInfo userInfo = new UserInfo();//userInfo.Id = Guid.NewGuid();//userInfo.UserName = "aa";//userInfo.Name = "张三";//Comment comment = new Comment();//comment.Id = Guid.NewGuid();//comment.Content = "东西挺好的";//comment.UserInfoId = userInfo.Id;// string sql = "insert into UserInfo values(@id,@userName,@name)";//connection.Execute(sql, userInfo);//string sql1 = "insert into Comment values(@id,@Content,@UserInfoId)";//connection.Execute(sql1, comment);//userInfo.Name = "李四";//string sqlupdate = "update UserInfo set name = @name where username=@username";//connection.Execute(sqlupdate, userInfo);//string sqldelete = "delete from userinfo where username = @username";//connection.Execute(sqldelete, userInfo);　//通过connection.Query(sql)执行查询// string query = "select * from userinfo";// var list =  connection.Query(query).ToList();// foreach (dynamic d in list)// {//     Console.WriteLine(d.UserName);// }// string query1 = "select * from userinfo where username = @username";//List<UserInfo> userInfos = connection.Query<UserInfo>(query1, new {username = "bb"}).ToList();// foreach (UserInfo d in userInfos)// {//     Console.WriteLine(d.UserName);// }string query = "select * from userinfo u left join comment c on u.id=c.userInfoId";////Query<TFirst, TSecond, TReturn>//List<UserInfo> userInfos = connection.Query<UserInfo, Comment, UserInfo>(query,//    (userInfo, comment) =>//    {//        if (userInfo.Comments == null)//        {//            userInfo.Comments = new List<Comment>();//        }//        userInfo.Comments.Add(comment);//        return userInfo;//    }//).ToList();　//通过connection.QueryMultiple(sql)一次查询多个实体//using (var multi = connection.QueryMultiple(query))//{//    var userInfoss = multi.Read<UserInfo>().ToList();//    foreach (var userInfo in userInfoss)//    {//        Console.WriteLine(userInfo.UserName);//    }//}//var user = connection.Query<UserInfo>("uspGetUser", new {id = "1A61D9E8-A295-4844-8EB1-3F390657CFBB"},//    commandType: CommandType.StoredProcedure).SingleOrDefault();//Console.WriteLine(user.Name);
Console.ReadKey();}