Technical Summary: UISampleSpark UISampleSpark is a comprehensive educational .NET 10 (ASP.NET Core) reference application that demonstrates and compares seven distinct front-end UI frameworks and patterns—MVC, Razor Pages, React, Vue, htmx, Blazor Server, and vanilla JavaScript SPA—all built against a common Employee/Department domain model. The project showcases modern web development practices including clean architecture with dependency injection, repository/service abstraction layers, comprehensive unit testing, and REST/OpenAPI endpoints via Swagger, making it an invaluable resource for developers evaluating UI technology trade-offs. The application emphasizes practical, production-ready features such as dynamic Bootswatch theme switching with instant light/dark mode toggling, responsive Bootstrap 5 UI, modal-based forms, data table functionality with pagination, pivot table reporting, and health check endpoints. The codebase leverages ASP.NET Core fundamentals (controllers, Razor Pages, minimal APIs), Entity Framework Core with in-memory databases for rapid development, and custom utility packages (WebSpark.Bootswatch, WebSpark.HttpClientUtility) that enable sophisticated client-side capabilities like CDN-based theme fetching. Architecturally, the project demonstrates professional DevOps and CI/CD practices through GitHub Actions workflows for automated building, testing, and Docker image deployment, containerization via Dockerfile and Docker Hub distribution, Azure App Service/Pipeline integration, and structured logging with Application Insights telemetry. The repository's highly-active development history (54 commits in 90 days, evolving from .NET 5 through .NET 10) reflects its use as a living educational tool continuously updated with the latest framework versions and patterns. Target Audience: Full-stack developers, architects evaluating frontend frameworks, teams migrating legacy ASP.NET applications, and learners seeking hands-on examples of clean code principles, modern testing strategies, containerization, and deployment automation in a .NET ecosystem. The MIT-licensed codebase serves both as a learning reference and as starter templates for building scalable, well-tested web applications with multiple UI implementation options.