azure service bus duplicate detection

 

Azure service bus duplicate detection works by using messageId as a unique identifier. If a sender tries to send messages with the same messageId, the first one gets into the queue. The other subsequent duplicate messageId will be ignored. 

// create the sender

ServiceBusSender sender = client.CreateSender(queueName);

// create a message batch that we can send

ServiceBusMessageBatch messageBatch = await sender.CreateMessageBatchAsync();

messageBatch.TryAddMessage(

    new ServiceBusMessage("Session1-1")

    {

        MessageId = "Session1"

    });

messageBatch.TryAddMessage(

    new ServiceBusMessage("Session1-3")

    {

        MessageId = "Session1"

    });

messageBatch.TryAddMessage(

    new ServiceBusMessage("Session1-2")

    {

        MessageId = "Session1"

    });

// send the messages

await sender.SendMessagesAsync(messageBatch);

// Message Session1-1 gets into the queue

// Message Session1-2 and Session1-3 ignored

Console.WriteLine("Done sending messages.");