how to make simple login form in c#

Hey!
Here's a solution

http://www.c-sharpcorner.com/UploadFile/2072a9/creating-log-insign-in-page-using-net-framework/
:)

/*....................You can  do this like..............................*/




using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Net;
using System.Net.Mail;




public partial class login : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
       
        if (!IsPostBack)
        {
            MultiView1.SetActiveView(View1);
        }
    }
   
    provider_Registration p = new provider_Registration();
    container_reg c = new container_reg();
    protected void Button1_Click(object sender, EventArgs e)
    {
        dbop op = new dbop();
        Session["user_id"] = TextBox1.Text;
        Session["password"] = TextBox2.Text;
        DataTable dt=new DataTable();


        dt = op.ret("select * from Registration where user_id='" + TextBox1.Text + "' and password='" + TextBox2.Text + "'");
        if (dt.Rows.Count > 0)
        {
            DataRow dr = dt.Rows[0];
            Session["id"] = TextBox1.Text;
             Response.Redirect("Home.aspx");
        }
        else
        {
            Label2.Visible = true;
            //Response.Write("");
        }
     
         
    }


   
    protected void LinkButton1_Click1(object sender, EventArgs e)
    {
        MultiView1.SetActiveView(View2);
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        DataTable dt=new DataTable();
        c.puser_id = Convert.ToInt32(TextBox3.Text);
        c.pmobile_no = Convert.ToInt64(TextBox4.Text);
        dt=p.sel(c);
        if (dt.Rows.Count > 0)
        {
            DataRow dr = dt.Rows[0];
            string pwd = dr[1].ToString();
            string eml = dr[0].ToString();
            //Label1.Text = pwd;
            try
            {
                string email = "";
                string password = "";
                MailMessage msg = new MailMessage("[email protected]", eml);
                msg.Subject = "Password Recovery";
                msg.Body = "Yor password=" + pwd;
               SmtpClient cl = new SmtpClient("smtp.gmail.com", 587);
                cl.EnableSsl = true;
                cl.Credentials = new NetworkCredential("[email protected]", "ziya1234");


                cl.Send(msg);
            }
            catch 
            { 
           
            }

        }
        else
        {
            Label1.Visible = true;
            Label1.Text = "Incorrect User ID or Mobile Number";
            //Response.Write("");
        }   
    }
    }