خطایی در حین لاگین شدن

[esafb52]

ظاهرا خط کامنتکسن خطا داره
اینو ببین

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Data.SqlClient;



namespace CheckUserNameAndPassword

{

    public partial class Form1 : Form

    {

        private SqlConnection objconnection = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirector  y|\Dbase_UP.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True");

        private SqlCommand objcommand;



        public Form1()

        {

            InitializeComponent();

        }



        private void btnLogin_Click(object sender, EventArgs e)

        {

            int i = 0;

            try

            {



                if ((txtUserName.Text == string.Empty) || (txtPassword.Text == string.Empty))

                {

                    MessageBox.Show("Enter Data !");

                    return;

                }



                objcommand = new SqlCommand("SELECT COUNT(*) FROM Tbl_Users " +

                    "WHERE UserName=@UserName AND Password=@Password", objconnection);



                objcommand.Parameters.AddWithValue("@UserName", txtUserName.Text.ToString());

                objcommand.Parameters.AddWithValue("@Password", txtPassword.Text.ToString());



                if (objconnection.State == ConnectionState.Closed)

                {

                    objconnection.Open();

                    i =(int) objcommand.ExecuteScalar();

                }//end if



                objconnection.Close();



                if (i > 0)

                {

                    Form2 frm2 = new Form2();

                    frm2.Show();

                }

                else

                    MessageBox.Show("No Authentication !");

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.Message.ToString());

            }

            finally

            {

                i = 0;

                objconnection.Close();

            }

        }

    }

}