Highlights & Release Notes
- Highlights and Release Notes
  - SIMATIC WinCC Open Architecture - New in Version 3.19
    - ***
    - Performance
    - Licensing
    - Web Activities
    - Archiving
    - Connectivity
    - Others
      - Core Enhancements
        Protected investments with long-term availability and constantly enhanced feature sets.
      - User Interface Enhancements
        Save valuable engineering time through increased usability and enhanced feature range.
      - Video AddOn
        Save costs directly and expand your areas of application.
      - Control Enhancements
        Save engineering time with even better usability and extended feature range.
      - CTRLPPCheck
        Save time and money with increased code quality in your projects
      - Evolution of WinCC OA .Net API
        Easier integration of C# based business logic
      - Miscellaneous Enhancements
        Miscellaneous Enhancements Enhanced feature set
    - Discontinuations & Deprecations
    - Supported Operating Systems and Platforms
      Overview
    - Supported Mobile Systems and Browsers
      Overview
- Patch Release Notes
- Notes for Upgrading a WinCC OA Project
  Important steps and information to consider when upgrading an existing WinCC OA project to the latest version.
- WinCC OA Version Incompatibilities
  A list of all incompatibilities that needed to be introduced between different versions of WinCC OA.

Evolution of WinCC OA .Net API

Easier integration of C# based business logic


Multithreaded, platform-independent .Net API allows you to easier integrate your existing C# business logic into WinCC OA. WinCC OA 3.19 API closer to .Net language standards Uses dedicated namespaces and "NuGet" packages Interface abstraction is available Dependency injection support Asynchronous by design Switch .Net Runtime to .Net 6 Net 6 Runtime is Open Source Net Framework end of development reached Performance and productivity improvements due to new language features Platform-independent Migration of existing C# managers required Migration documentation available Namespace changes Interfaces are used instead of classes Usage of asynchronous patterns

Further Notes

You can find the documentation of the new API in the version directory: C:\Siemens\Automation\WinCC_OA\3.19\api.net\docu\index.md. The new .NET-API based on .NET 6.0. replaces the old C# API.