void client_OnMessageReport(object sender, ReportEventArgs e)
{
Console.WriteLine(e.MessageId);
Console.WriteLine(e.StatusText);
}
void _OnMessageReport(object sender, ReportEventArgs e)
{
Console.WriteLine("Received message report, {0}, {1}.", e.MessageId, e.StatusText);
lock (_msgIds)
if (_msgIds.Contains(e.MessageId)) _msgIds.Remove(e.MessageId);
else Console.WriteLine("Message id not found: {0}.", e.MessageId);
}