protected async override void OnNavigatedTo(NavigationEventArgs e) { STRBDpopin.Begin(); if (e.Parameter == null) { return; } if (!(e.Parameter is MailInfo)) { return; } PRGRSmail.ProgressStart(); var info = e.Parameter as MailInfo; message = await MailUtil.GetMessageAsync(info.MailFolderType, info.Index); try { TXTBLKmailTitle.Text = message.Subject; } catch { } try { WBVWmailBody.NavigateToString(message.HtmlBody); } catch { FindName(nameof(TXTBLKmailBody)); TXTBLKmailBody.Text = message.TextBody; } PRGRSmail.ProgressEnd(); }