/// <summary>
/// Creates a message ID. If the message is a request, the peer address is the sender.
/// Otherwise, it is the recipient. This is due to the fact that depending on the direction,
/// peer addresses may change, but it is still considered the same message.
/// </summary>
/// <param name="message">The message.</param>
public MessageId(Message message)
: this(message.MessageId, message.IsRequest() ? message.Sender : message.Recipient)
{
}