ANN RabbitMQ .NET AMQP 0.9.1 Client v7.3.0-beta.0

[Luke Bakken]

Hello RabbitMQ users and community,

Team RabbitMQ announces version 7.3.0-beta.0 of the AMQP 0.9.1 .NET client library, a prerelease of 7.3.0:

https://www.nuget.org/packages/RabbitMQ.Client/7.3.0-beta.0

https://github.com/rabbitmq/rabbitmq-dotnet-client/releases/tag/v7.3.0-beta.0

7.3.0 is a large release: security fixes, many connection recovery and shutdown fixes, and new OpenTelemetry tracing configuration. Please try this beta against your applications and tell us what breaks. We plan to release 7.3.0, together with RabbitMQ.Client.OpenTelemetry 1.0.0-rc.3, on November 17th, 2026. This milestone tracks what 7.3.0 will contain:

https://github.com/rabbitmq/rabbitmq-dotnet-client/milestone/76

Some changes may need action when you upgrade. The release notes linked above cover each one; in particular:

• TLS: an amqps:// URI now verifies the broker's certificate against the host name, and a factory with TLS enabled no longer falls back to cleartext for an endpoint without TLS. A deployment that relied on either of these will fail to connect after upgrading.
• IChannel has new abstract members, so a class that implements IChannel directly, such as a hand-written test double, will no longer compile.
• BasicConsumeAsync with a consumer tag already in use on that channel now throws InvalidOperationException instead of the broker closing the connection.
• Several tracing members and Headers.XQueueMode are now [Obsolete], which fails a build that treats warnings as errors.

If you have questions, or find an issue with this beta, please start a discussion here and Team RabbitMQ will assist you if possible:

https://github.com/rabbitmq/rabbitmq-dotnet-client/discussions

Thank you!
Luke Bakken

Team RabbitMQ

Amazon MQ