This pull request modernizes the OPC UA .NET codebase and tests, removes .NET Standard 2.0 support from certificate/security code, and updates test code to use C# 12 and .NET 8+ features for clarity and maintainability.
- Certificate and BouncyCastle interop files (e.g., CertificateBuilder.cs, X509Extensions.cs, X509SignatureFactory.cs) are refactored to drop NETSTANDARD2_0 support and use modern .NET APIs and conditional compilation.
- Test code across the codebase is updated to use default, strongly-typed Parse methods, collection expressions, and improved async/await patterns.
- Exception handling and assertions in tests are modernized, and test method naming is made consistent with Async suffixes.
- The project and build files are updated to clarify Roslynator analyzer usage and remove obsolete netstandard tags.
- General code and test cleanup includes improved null safety, type safety, and removal of deprecated or unused code.
Three new DataTypes plus Variables containing them were added to the Reference Server:
- VectorUnion (as Scalar and Array): The VectorUnion contains three fields (X, Y, Z) and a SwitchField. When it is used as value, it is generated randomly (SwitchField set to None or one of the Fields)
- VectorWithOptionalFields (as Scalar and Array): The VectorWithOptionalFields contains again three fields (X, Y, Z), but they are all optional. When it is used as a value, it is generated with 0 to all fields activated.
- MultipleVectors (as Scalar and Array): The MultipleVectors type contains 6 Components. A regular Vector, a VectorUnion (from before), a VectorWithOptionalFields (also from before) and the same as Arrays.
- Issue fix: Currently when diagnostics is enabled in client calls, the string table in the response header is not updated when a service call is split into multiple service calls. In this case the stringtables from all calls must be appended and the index in the diagnosticinfo must be updated to match the updated string list.
- To reduce the number of 'null' DiagnosticInfo allocations, the decoders now try to return null instead of a default DiagnosticInfo. A new property ÌsNullDiagnosticInfo' can be used to check for unused DiagnosticInfo entries.
- The tests were slightly improved to use test set data from the generated TestData namespace, which contains also a historical node.
- All `ServerFixtureUtils.ValidateXXX` checks were updated to include the check for diagnosticInfos and the string tables to catch issues.
- The StructureValue DataType value has a Method and event as childs, but it may only have variables / properties.
- Uses latest generated code from Modelcompiler which fixes issues with child variables read/write/monitoring.
- support for Microsoft.Extensions.Logger.ILogger in Opc.Ua.Core as the new logging interface
- backward compatible with config and TraceEvents
- new API Utils.SetLogger allows to set ILogger
- updated Console samples to demonstrate ILogger support with Serilog
- support for EventSource logging
- see Docs/Logging.md for more info
Marc Schier