string b = Convert.ToString(UserNameComboBox.SelectedItem);
            SqlConnection DataFind = new SqlConnection(@"Data Source=.sqlexpress; Initial Catalog=PAYROLL MANAGEMENT SYSTEM;Integrated security=true;");
            DataFind.Open();

            SqlCommand dmd;
            dmd = new SqlCommand("SELECT COUNT(*) FROM LoginDetail where( (UserName=' " + b + "') AND (Password='" + Password.Text + "' ))", DataFind);
            dmd.ExecuteNonQuery();
            Int32 count = Convert.ToInt32(dmd.ExecuteScalar());

            DataFind.Close();
            SelectedRowNo.Text = count.ToString();
            if (count == 1)
            {
                Form1 s = new Form1();
                s.Show();
            }
            else
            {
                MessageBox.Show("Sorry You are not an authirized user");
            }
        }
        catch { MessageBox.Show("UserName or Password not valid");
        }
    }