SQL Login codesPB64

 private void btnLogin_Click(object sender, EventArgs e)
        {
            SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\Lenovo\Desktop\Visual Studio labsheet 2nd\ProjectP\ProjectP.mdf;Integrated Security=True");
            SqlDataAdapter sqa = new SqlDataAdapter("Select count (*) From tblLogin where Username = '" + txtUser.Text + "' and Password = ' "+ txtPass.Text + "'", con);
            DataTable dt = new DataTable();
            sqa.Fill(dt);

            if (dt.Rows[0][0].ToString()=="1")
            {
                this.Hide();
                MainMenu main = new MainMenu();
                main.Show();
            }
            else
            {
                MessageBox.Show("Username/Password is incorrect. Try again.");
            }

        }