RSB 3.0 Customize DeliverBy

CustomizeOutgoingMessages.cs

public class CustomizeOutgoingMessages : ICustomizeOutgoingMessages
{
    public void Customize(OutgoingMessageInformation messageInformation)
    {
        // Messages is an object[] containing the batch of messages being sent.
        // This will only have one message unless you send multiple 
        // messages at once with using IServiceBus.
        var message = messageInformation.Messages[0] as SomeTemporaryMessage;
        if (message != null)
        {
            messageInformation.DeliverBy = DateTime.Now.AddSeconds(message.ValidForSeconds);
        }
    }
}