private void ProgressBarFileBegin(object sender, SocStatusEventArgs e) { if (this.ProgressBarFileReceiving.InvokeRequired) { CallbackProgressBarFileBegin d = new CallbackProgressBarFileBegin(ProgressBarFileBegin); this.Invoke(d, new object[] { sender, e }); } else { this.ProgressBarFileReceiving.Visible = true; Logger.info("ProgressBarFileReceiving.Visible=" + ProgressBarFileReceiving.Visible); } }