Introduction

The .NET / C# SDK is the framework-agnostic core: a wire-envelope codec, contracts and dead-letter helpers that read and write the exact same strict JSON envelope as every other language in the ecosystem.

It is intentionally not a runtime — there is no publish call, no worker loop. You build (or decode) the canonical envelope here and move the bytes with your own broker client, so it works over Redis, RabbitMQ or anything else.

What you get

• Canonical, schema-validated JSON envelopes (schema_version: 1) — no language lock-in.
• A built-in trace_id on every message for cross-service correlation.
• URN routing (urn:babel:<context>:<event>) on a stable key.
• Zero dependencies (in-box System.Text.Json only) — bring your own broker client.

Continue to Installation.