Message serialization of connected transport (AzureServiceBusTransport)

[KatoStoelen]

I'm currently using this package in send-only endpoints to safely combine database write operations and message sending when using Azure Service Bus as transport. I do, however, struggle to configure the NewtonsoftSerializer. As per this sample, I have the following ConnectorConfiguration:

var connectorConfiguration = new ConnectorConfiguration<AzureServiceBusTransport>(
    "MyEndpoint",
    "[SQL_CONNECTION_STRING]",
    connectedTransport =>
    {
        connectedTransport.ConnectionString("AZURE_SERVICEBUS_CONNECTION_STRING");

        var transportSettings = connectedTransport.GetSettings();

        var serializer = Tuple.Create(
            new NServiceBus.NewtonsoftSerializer() as SerializationDefinition,
            new NServiceBus.Settings.SettingsHolder());

        transportSettings.Set("MainSerializer", serializer);
    });

But, messages sent to Azure Service Bus is serialized as XML. Is there anything wrong with the configuration?

In my receive endpoints I have now added the XML serializer as an additional deserializer, which works fine. It would, however, be nice if I could use the same serialization everywhere (JSON in this instance).