- Build with the .NET 9 SDK.
- Add tests TFM for `net9.0`.
- Remove tests for `net6.0` TFM.
- Run workflows on PRs to `dotnet-vnext` branch.
- Only audit direct NuGet dependencies.
- Fix IDE0022 warning.
- Temporarily disable some tests that are failing in GitHub Actions.
- Add usage of `[DebuggerDisableUserUnhandledExceptions]` to avoid newer versions of the Visual Studio debugger for breaking for exceptions on async code paths we are intentionally handling.
- Bump version to 8.5.0.
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