'Remember Me' option in ASp.net

using System;

usingSystem.Data;

usingSystem.Configuration;

usingSystem.Collections;

usingSystem.Web;

usingSystem.Web.Security;

usingSystem.Web.UI;

usingSystem.Web.UI.WebControls;

usingSystem.Web.UI.WebControls.WebParts;

usingSystem.Web.UI.HtmlControls;

using System.IO;

namespaceWebApplication1

{

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

    {

        protectedvoid Page_Load(objectsender, EventArgs e)

        {

            if(!IsPostBack)

            {

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

                {

                    HttpCookiecookie = Request.Cookies.Get("myCookie");

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

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

                }

            }

        }

        protectedvoid btnLogin_Click(objectsender, EventArgs e)

        {

            try

            {

                objImpl = new mymethod();

                boolIsAvailable = false;

                HttpCookiemyCookie = new HttpCookie("myCookie");

                boolIsRemember = chkRememberMe.Checked;

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

                if(IsAvailable)

                {

                    DataTabledtUserName = 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");

            }

        }

     

    

    }

}