private bool checkClientExistence() { if (txt_client_id.Text == "" && txt_client_mobile.Text == "") { return false; } ClientEntity ce = new ClientEntity(); if (txt_client_mobile.Text != "") { return ce.ClientExistsByMobileNo(txt_client_mobile.Text, txt_client_mobile.Text); } else { return ce.ClientExistsById(txt_client_id.Text); } }