public void AsyncCallBlackList(IAsyncResult res) { try { WebReference.WebSDataBrCode BrServer = res.AsyncState as WebReference.WebSDataBrCode; blacklistApp = BrServer.EndBLACKLISTAPP(res).ToList(); labelStatus.BeginInvoke(new Action(() => { labelStatus.Text = "BlackList - ok"; })); } catch (Exception ex) { labelStatus.BeginInvoke(new Action(() => { labelStatus.Text = "BlackList - fail"; })); CLog.WriteException("ServiceFunc.cs", "AsyncCallBlackList", ex.Message); } }