Tests to ensure wire compatibility between versions of NServiceBus. The tests use MSMQ as the underlying transport since its been available since the start

So the solution tests all "most current" patch versions since 3.3.8.

All NuGets are specified with a wildcard for the patch.

<PackageReference Include="NServiceBus" Version="3.3.*" />

The Callbacks and Encryption solutions, when targeting the external packages, the project targets the current minor of the core. e.g.

<PackageReference Include="NServiceBus" Version="6.*" />
<PackageReference Include="NServiceBus.Callbacks" Version="1.1.*" />

All scenarios are run with versions communicating to themselves and each other.

Effectively a Bus.Send() and a Bus.Reply().

A Bus.Publish.

This is included in both the Send Reply and Gateway tests

A Bus.Send(...) with a .Register and a Bus.Return().