virtual protected void OnUserAvail(AvailEventArgs e) { if (UserAvailable != null) { UserAvailable(this, e); } }
void im_UserAvailable(object sender, AvailEventArgs e) { this.BeginInvoke(new MethodInvoker(delegate { if (e.UserName == sendTo) { if (e.IsAvailable == true) { label4.Text = "Online"; } } })); }