//logout
private void backgroundWorker1_RunWorkerCompleted(object sender,
RunWorkerCompletedEventArgs e)
{
LogoutNsTalk talk = new LogoutNsTalk();
talk.Logout(ClientInfo.session);
}
protected override void OnClosed(EventArgs e)
{
LogoutNsTalk talk = new LogoutNsTalk();
talk.Logout(ClientInfo.session);
Application.ExitThread();
}