private void btnLogout_Click(object sender, EventArgs e)
        {
            this.Hide();
            LoginActivity LoginForm = new LoginActivity();

            LoginForm.Show();
        }
        private void ValidateRule()
        {
            if (roleValue == "ROLE_ADMIN")
            {
                CallMainMenu();
            }
            else if (roleValue == "ROLE_GUARD")
            {
                //Environment.Exit(0);
                IsCallingMainMenu = true;

                this.Hide();
                reader.CloseCom();
                LoginActivity LoginForm = new LoginActivity();
                LoginForm.Show();
            }
        }
        private void logOutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            try
            {
                if (tabCtrlMainMenu.TabCount == 0 || (tabCtrlMainMenu.TabCount != 0 && MessageBox.Show("Are you sure you want logout?" + "\n" + "There are active form(s) open.", "Confirm...", MessageBoxButtons.YesNo, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button2) == DialogResult.Yes))
                {
                    logoutCloseCameraReader();

                    this.Hide();
                    LoginActivity LoginForm = new LoginActivity();
                    LoginForm.Show();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }