| AzureStorageQueueConstants | A set of helpers to convert file system-related magic strings to compiled references. |
| AzureStorageQueueEncoding | Determines how QueueMessage.Body is represented in HTTP requests and responses. |
| AzureStorageQueueOptions | Specifies the options required to leverage Azure Queue Storage as the SimpleMessageBus backing queue. |
| FileSystemConstants | A set of helpers to convert file system-related magic strings to compiled references. |
| FileSystemOptions | Specifies the options required to leverage the local file system as the SimpleMessageBus backing queue. |
| KafkaAuthenticationMode | SASL authentication mechanisms for Kafka. |
| KafkaBrokerProtocol | Kafka security protocol options. |
| KafkaConstants | Constants for Kafka topic and consumer group configuration placeholders. |
| KafkaOptions | Specifies the options required to leverage Apache Kafka as the SimpleMessageBus backing queue. |
| MessageBase | Base class providing a complete implementation of common message functionality. |
| MessageEnvelope | Represents a wrapper for an IMessage that will be published to the SimpleMessageBus Queue. |