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Marc Schier 43ce7ed229 Code clean up and improvements (#3532 )

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.

2026-02-09 13:37:06 +01:00

Properties

Update headers and license files (#3388 )

2025-12-04 19:44:40 +01:00

ClientSamples.cs

Code clean up and improvements (#3532 )

2026-02-09 13:37:06 +01:00

ConsoleReferenceClient.csproj

Introduce telemetry context and proper use of ILogger (#3213 )

2025-09-25 20:25:31 +02:00

dotnettrace.cmd

Tracing and Logging improvements for the UA Core and libraries (#1631 )

2021-12-16 00:20:08 +01:00

Program.cs

Code clean up and improvements (#3532 )

2026-02-09 13:37:06 +01:00

Quickstarts.ReferenceClient.Config.xml

Enable roslynizer and fix all analyzer issues (#3157 )

2025-08-16 04:10:24 -07:00

README.md

Add reverse connect command line support to ConsoleReferenceServer (#3376 )

2025-12-04 15:33:24 +01:00

UAClient.cs

Code clean up and improvements (#3532 )

2026-02-09 13:37:06 +01:00

README.md

OPC Foundation UA .NET Standard Reference Client

Introduction

The console reference client can be configured using several console parameters. Some of these parameters are explained in more detail below.

To see all available parameters call console reference client with the parameter -h.

Reverse Connect

The OPC UA reverse connect feature allows an OPC UA server to initiate the connection to a client, rather than the traditional model where clients connect to servers. This is particularly useful in scenarios where the server is behind a firewall or NAT, making it difficult for clients to directly connect to it.

How to use Reverse Connect

To enable reverse connect mode, specify the client endpoint URL using the --rc or --reverseconnect parameter:

dotnet ConsoleReferenceClient.dll --rc=opc.tcp://localhost:65300 opc.tcp://localhost:62541/Quickstarts/ReferenceServer

The client will start a reverse connect listener on the specified endpoint (e.g., opc.tcp://localhost:65300) and wait for the server to connect to it.

Example: Client and Server with Reverse Connect

Start the client with reverse connect listener on port 65300:

dotnet ConsoleReferenceClient.dll --rc=opc.tcp://localhost:65300 opc.tcp://localhost:62541/Quickstarts/ReferenceServer

In a separate terminal, start the server with reverse connect to the client:
```
dotnet ConsoleReferenceServer.dll --rc=opc.tcp://localhost:65300 -a
```

The server will establish a reverse connection to the client endpoint, and the client will use this connection to communicate with the server.

How to specify User Identity

Username & Password

Specify as console parameters: -un YourUsername -up YourPassword

Certificate

Place your user certificate in the TrustedUserCertificatesStore (the path can be found in the client configuration XML). Make sure to include an accessible private key with the certificate. Specify console parameters: -uc Thumbprint (of the user certificate to select) -ucp Password (of the user certificates private key (optional))