problem in db connectionusing System; using System.Collectio

this is my login page and its showing error in connecting to db and can you also help me out if i can user same login for admin and user using a reader

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.Data.SqlClient;

using System.Data.SqlTypes;

namespace Gateway_Security_System_and_Logs

{

public partial class bsl_login : Form

{

public bsl_login()

{

InitializeComponent();

}

private void label1_Click(object sender, EventArgs e)

{

}

private void button2_Click(object sender, EventArgs e)

{

textBox2.Clear();

textBox1.Focus();

}

private void button1_Click(object sender, EventArgs e)

{

string userName = textBox1.Text;

string Pass = textBox2.Text;

if (userName == "" && Pass == "")

{

MessageBox.Show("Please Enter Login Id and Password");

}

else

{

SqlConnection con = new SqlConnection(@"server=.\SQLEXPRESS ; database=bsl_login; Trusted_Connection=yes");

string query = "userlogin"; //stored Procedure Name

SqlCommand com = new SqlCommand(query, con);

com.CommandType = CommandType.StoredProcedure;

com.Parameters.AddWithValue("@Usename", userName);

com.Parameters.AddWithValue("@Pass", Pass);

con.Open();

int usercount = (Int32)com.ExecuteScalar();

if (usercount == 1) //if user credential is matched then Usercount value is 1 otherwise it is 0

{

this.Hide(); //hiding form 1

bsl_user M1 = new bsl_user();//passing user Name to Second form so we can user Logged user Name

M1.Show();

}

else

{

bsl_login Lg = new bsl_login();

Lg.Show();

MessageBox.Show("LoginId or Password Is wrong"); //if user Name is not available in database

}

private void bsl_login_Load(object sender, EventArgs e)

{

}

private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

{

this.Hide();

bsl_admin ad1 = new bsl_admin();

ad1.Show();

}