Upgrade from version 4 to 5 does not require any code changes.
Getting Started 
Architecture 
Service Platform 
NServiceBus 
Transports 
Persistence 
ServiceInsight 
ServicePulse 
ServiceControl 
Monitoring 
Modernization 
Shape the future 
Samples Azure Blob Storage Databus Upgrade Version 4 to 5
Component: Azure Blob Storage Databus
Related Articles
- Upgrade Version 7 to 8
Instructions on how to upgrade NServiceBus from version 7 to version 8.