Technical Summary: WebSpark.PrismSpark WebSpark.PrismSpark is a high-performance C#/.NET port of the popular PrismJS syntax highlighting library, providing advanced code tokenization and HTML rendering for 24 programming languages with support for .NET 10.0 LTS. The project implements a sophisticated architecture featuring a grammar-based tokenization engine, extensible plugin and hook systems, and a theme manager that supports both built-in and custom CSS-based themes, enabling developers to integrate professional syntax highlighting into web applications, documentation platforms, and code editors. Built with performance as a core concern, the library offers async processing, caching mechanisms, and flexible options for line highlighting, custom CSS classes, and metadata-driven customization, while maintaining full compatibility with ASP.NET MVC/Razor views through dependency injection integration. The codebase is well-engineered with a comprehensive 52-test MSTest suite covering grammar creation, tokenization, HTML generation, and end-to-end integration workflows, along with interactive demo pages including a live editor and markdown renderer powered by Markdig. What distinguishes this project is its seamless .NET ecosystem integration through service registration patterns, rendering capabilities that go beyond tokenization to produce fully styled HTML output, and a developer-friendly API that balances simplicity for common use cases with deep extensibility for advanced scenarios. This makes it particularly valuable for .NET developers building documentation systems, code review platforms, educational tools, or any application requiring embeddable, themeable syntax highlighting without JavaScript dependencies.