'Remember Me' option in ASp.net

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.IO;

namespace WebApplication1

{

    public partial class WebForm4 : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                if (Request.Cookies["myCookie"] != null)

                {

                    HttpCookie cookie = Request.Cookies.Get("myCookie");

                    txtUserName.Text = cookie.Values["username"];

                    txtPassword.Text = cookie.Values["password"];

                }

            }

        }

        protected void btnLogin_Click(object sender, EventArgs e)

        {

            try

            {

                objImpl = new mymethod();

                bool IsAvailable = false;

                HttpCookie myCookie = new HttpCookie("myCookie");

                bool IsRemember = chkRememberMe.Checked;

                IsAvailable = objImpl.CheckUserLogin(txtUserName.Text, txtPassword.Text);

                if (IsAvailable)

                {

                    DataTable dtUserName = objImpl.ReadUserIdbyUserName(txtUserName.Text);

                    if (dtUserName != null)

                    {

                        if (dtUserName.Rows.Count == 1)

                        {

                            Session["UserId"] = dtUserName.Rows[0].ItemArray[0].ToString();

                        }

                    }

                    if (IsRemember)

                    {

                        myCookie.Values.Add("username", txtUserName.Text);

                        myCookie.Values.Add("password", txtPassword.Text);

                        myCookie.Expires = DateTime.Now.AddDays(15);

                    }

                    else

                    {

                        myCookie.Values.Add("username", string.Empty);

                        myCookie.Values.Add("password", string.Empty);

                        myCookie.Expires = DateTime.Now.AddMinutes(5);

                    }

                    Response.Cookies.Add(myCookie);

                    //FormsAuthentication.RedirectFromLoginPage(txtUserName.Text, chkRememberMe.Checked);

                    Response.Redirect("dashboard.aspx");

                }

                else

                {

                    lblError.Text = "Invalid UserName or Password or else your Username blocked";

                }

            }

            catch (Exception ex)

            {

                Response.Redirect("Default.aspx");

            }

        }

     

    

    }

}