NServiceBus 9.2

Apply the C# 14 prompt first. These rules target NServiceBus 9.2, including its mandatory serializer selection and migration from the core DataBus to NServiceBus.ClaimCheck. NServiceBus's runtime minimum does not itself require C# 14.

Supported scope and deployment baseline

• Lock NServiceBus and compatible transport, persistence, serializer, hosting, Claim Check, and monitoring packages through Central Package Management or a lock file, and take each new 9.2 patch: Particular supports only the latest patch of a supported minor line, and it fixes vulnerable dependencies with new core and component patches that each need their own update.
• Run the net8.0 package on a supported .NET 8-or-later runtime and production Windows or Linux platform; .NET Framework is unsupported and macOS is development-only. Plan migration from .NET 8 or 9 before their 2026-11-10 support deadline.
• Track 9.2 mainstream support through 2028-01-29 and paid extended support through 2030-01-29 independently of runtime and component lifecycles; the core package's support status does not establish that every deployed dependency is supported or patched.
• Assign a stable, trusted endpoint name and keep logical identity, instance/discriminator, queues, namespaces, topology, routing, and persistence settings in protected startup configuration.
• Separate production messaging, persistence, error and audit queues, ServiceControl, and large-payload storage from nonproduction and from untrusted build or pull-request workloads.

Infrastructure identity and message routing

• Authenticate