Prepares the repository for a 2.0 release: bumps every version reference
from 1.6 to 2.0, and lands the migration guide describing the 1.5.378 →
2.0 upgrade path. The 1.6 line never shipped, so this is a straight
rename with no historical 1.6 migration content to preserve.
The PR is split into two commits:
1. **`Bump version to 2.0 (next release is a major version change)`** —
version metadata, NuGet metadata, the side documentation, and the
migration agent file.
2. **`[Docs] Close 19 audit gaps in 1.5.378 to 2.0 migration guide`** —
adds and reorganizes `Docs/MigrationGuide.md` to close every gap from a
rigorous code-review audit of the 1.5.378 → 2.0 breaking-change surface.
### Version bump (commit 1)
- `version.json`: `1.6-preview` → `2.0-preview`
- `common.props`: `<VersionPrefix>1.6</VersionPrefix>` →
`<VersionPrefix>2.0</VersionPrefix>`
- `nuget/Opc.Ua.nuspec` and `nuget/Opc.Ua.Symbols.nuspec`: `1.6.0` →
`2.0.0`
- `README.md`: "New in 1.6" → "New in 2.0"
- `Docs/ComplexTypes.md`, `Docs/Observability.md`, `Docs/Sessions.md`:
1.6 → 2.0 mentions
- Renames `.github/agents/opcua-v16-migration.agent.md` →
`.github/agents/opcua-v20-migration.agent.md` and updates the agent
metadata (name, description, trigger phrases, version table)
- `UA.slnx`: solution-items reference updated to the new agent filename
-
`Tools/Opc.Ua.SourceGeneration.Core/Generators/ObjectTypeProxyGenerator.cs`:
two v16 → v20 comment fixes
### Migration guide (commit 2)
Closes 19 gaps from an audit comparing `master378` (1.5.378) with
`master` (2.0). Adds a new top-level **Package, Target Framework and
Dependency Changes** section covering the new `Opc.Ua.Core.Types` and
`Opc.Ua.Security.Certificates` packages, the `LibTypesTargetFrameworks`
netstandard2.0 drop, the NuGet dependency additions/removals, and the
residual Newtonsoft.Json dependency in `Opc.Ua.PubSub`.
In-place additions:
- new H4 for `INodeManager3` under Node States
- `Session.Call` `Variant.From` worked example
- new H3 `Subscriptions and Transports` with H4 verdicts for Durable
subscriptions (source-breaking), PubSub (no source break) and Reverse
connect (no source break)
- new H3 `Telemetry and Logging` covering `ITelemetryContext`
constructor-injection patterns
- `in DataValue` async copy-to-local pattern
- UNSAFE / SAFE pair for `WithPoolNotifications` pooling
- using-alias example for classic vs V2 `SubscriptionOptions`
- "Silent regression" callout for `OnAfterCreate`
- numbered lifecycle ordering for
`ApplicationConfiguration.CertificateManager`
Corrections:
- clarifies that the `SessionReconnectHandler` `[Obsolete]` is still
present in 2.0 (not withdrawn);
- clarifies that the source-generated `ServerCapability` constants vs
the `ServerCapabilityInfo` registry type are distinct;
- disambiguates `ReconnectPolicyOptions` (DTO) from `ReconnectPolicy`
(runtime).
Adds an "Automate the migration" pointer to the forthcoming
`Opc.Ua.CodeFixers` analyzer package, which mechanizes 17 of the
patterns covered in this guide. The analyzer is published in a follow-up
PR.
Concrete sub-types of the abstract OptionSet DataType (i=12755, e.g. AccessRights, CarExtras, OptionSetBase) were silently skipped by ComplexTypeSystem.LoadBaseStructureDataTypesAsync when only an EnumDefinition or OptionSetValues property was available. This change registers them with a new runtime class Opc.Ua.Encoders.OptionSet that reuses the generated Opc.Ua.OptionSet wire format (Value/ValidBits ByteStrings) and self-registers via IEncodeableType.
Key changes:
- New Stack/Opc.Ua/Types/OptionSet.cs with EnumDefinition-driven bit accessors (by name and index), GetSetFieldNames helper, and a fixed ByteLength derived from the highest declared bit per OPC UA Part 3 paragraph 8.40 / 3.2.8. SetBit throws ArgumentOutOfRangeException outside that range and always materializes Value/ValidBits to the fixed length.
- New AddOptionSetType entry point on IComplexTypeBuilder (source-breaking addition for custom implementations); DefaultComplexTypeBuilder implements it. The Reflection.Emit ComplexTypeBuilder throws NotSupportedException.
- ComplexTypeSystem detects OptionSet descendants via a HasSubtype walk and resolves the EnumDefinition from DataTypeDefinition or the OptionSetValues property fallback before the old skip path.
- Removed stale V1.04 OptionSet limitation remark from ComplexTypeSystem.
- 10 unit tests in Tests/Opc.Ua.Client.Tests/ComplexTypes/DefaultOptionSetTests.cs covering factory registration, bit accessors, binary round-trip via ExtensionObject, hand-crafted Part 6 wire format, Clone/CreateInstance semantics, and the ByteLength invariant.
- Live-verified against opc.tcp://DESKTOP-BGFJS91:48010 (UA C++ SDK demo): AccessRights/CarExtras/OptionSetBase now appear in the registered custom-type list; no skip-log entries; LoadAsync(throwOnError:true) returns true.
- Docs/ComplexTypes.md Known Limitations reworded; Docs/MigrationGuide.md gains an OptionSet DataType support subsection.
UInteger-backed OptionSet DataTypes remain intentionally opaque (carried as their unsigned integer in a Variant).
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
* make most ptojects aot compatible
* Remove newtonsoft
* Migrate all projects from Mono.Options to System.CommandLine 2.0.5
* Fix array clone
* Replace serializers for storage using new attribute driven type geberator
* Add new AOT integration tests covering all functional areas
* Documentation updates
Marc Schier