private void UserBtn_Click(object sender, EventArgs e) { ISecurity m_Security; m_Security = new SecurityClass(); InfoLbl.Text = ""; Securitylist.Items.Clear(); Infolist.Items.Clear(); string strUserName; string strUserSecurity = ""; strUserName = UsrNmeTxt.Text; if (strUserName == "") { MessageBox.Show("Please enter the user name"); } else { m_Security.GetUserRightsInfo(strUserName, ref strUserSecurity); Securitylist.Items.Add(strUserSecurity); } }