New features

See the notes for v4.2.0-beta. The most prominent one: new extensibility points for business logic, documented here and here.
This replaces the experimental Resource Hooks, which we intend to remove in the next major version.

Breaking changes

We had to take a few binary-breaking changes in obscure places. Just recompiling your project should be sufficient in nearly all cases. See our versioning policy.

Closed issues

• Consecutive exception hides original error (#1017)
• Bugs around empty included[] in response (#991)
• Adding extra includes from IResourceDefinition.OnApplyIncludes() does not work (#989)
• Sending an empty fields parameter results in error (#996)
• Makes the hashing algorithm used for ETags pluggable (#1007)