.NET Rocks!

The next version of CSLA is out! Carl and Richard talk to Rocky Lhotka about his business objects framework that pre-dates .NET itself! Rocky discusses the surge in development that occurred for version 9, where a company heavily dependent on CSLA contracted developers to clear some of the backlog. The result is a few new long-term contributors, resulting in an increased development candence and a substantial modernization of the code base. The conversation also turns to AI and its role in development, as well as Rocky's experiments with making an MCP server for CSLA!

Chris Klug, a developer architect skilled in cloud solutions and automation, shares his insights on effectively using .NET Aspire. He emphasizes cloud-native architecture, whether in the cloud or on-premises, and explores the interplay between containers and Kubernetes. Chris highlights Aspire's ease of debugging and managing multiple projects while discussing practical telemetry integration and deployment strategies. The conversation dives into testing methods and tools that enhance developer workflows, revealing tips on using Aspire for both new and existing projects.

Egil Hansen, an author and Microsoft MVP, shares his expertise on creating valuable tests for .NET applications. He emphasizes that effective testing is not just for developers but should withstand changes over time. The discussion highlights the four pillars of a valuable test suite and the tradeoffs between integration and unit testing. Egil also dives into using AI for generating and reviewing tests, cautioning against the maintenance burden of AI-generated tests, and he introduces mutation testing to identify weak spots in test coverage.

Joe Finney, a mobile product owner and MVP, dives into the world of local AI models. He discusses the advantages of using models like Tesseract for local OCR and the integration of Windows AI APIs. Joe highlights the potential of Hugging Face models for various tasks and shares insights on managing hardware requirements when running local models. He also weighs the pros and cons of running models locally versus in the cloud, emphasizing security and cost control. His pragmatic advice encourages developers to experiment with local solutions for optimal productivity.

In this discussion, James Montemagno, a Microsoft developer community lead, dives into AI's transformative role in coding with Visual Studio Code. He explores the differences in AI tooling between Visual Studio and Visual Studio Code, highlighting how each platform evolves. James compares various LLM models for coding tasks, shares best practices for using AI effectively, and discusses the concept of vibe coding—leveraging AI while maintaining human oversight. Discover practical insights on scaling AI usage and ensuring code validation!

Razor Tooling is evolving! Carl and Richard talk to David Wengier about the changes coming for Razor Pages in the next version of Visual Studio. David talks about the realization that much of the new work in Razor ties closely to Roslyn, which has resulted in a new co-hosting model that means higher performance and reliability for your web pages! The conversation delves into how capabilities in Visual Studio Code are shared with Visual Studio and vice versa, as well as the role of the Language Service Protocol in making it easier to bring more powerful tools to you.

Mads Kristensen, a program manager at Microsoft and a prolific creator of over 200 Visual Studio extensions, discusses the exciting advancements in Visual Studio 2026. The integration of AI is a game-changer, enhancing code completion and debugging. He highlights its role in project management and seamless collaboration with cloud services and GitHub. Mads also delves into user frustrations with development tools and the importance of adapting Visual Studio to meet evolving developer needs while maintaining security in digital environments.

How has DevOps changed in 2025? Carl and Richard talk to Michael Levan about his experiences helping teams automate their development workflows, and dealing with all the details that help the entire team focus on providing customer value. Michael digs into the role of the new AI tools in facilitating better workflows around code, testing, deployment, telemetry, and more. Then the conversation turns to security - and the many challenges that exist to make applications that are secure when deployed, and help with the security challenges that happen while in operation!

Diana Mounter, the head of design at GitHub with a rich background in systems thinking and inclusive design, shares her journey in shaping GitHub’s user experience. She discusses the evolution of design at the platform, the importance of integrating design with coding, and insights into the GitHub Primer design system. The conversation also touches on the dynamics of collaboration between design and engineering, the role of generative AI in shaping modern design, and how creativity must balance with practicality in tech.

What's coming in C#14? Carl and Richard chat with Dustin Campbell about the next version of C#, discussing what it takes to continue advancing software development in the Microsoft ecosystem. Dustin discusses how features are selected from version to version, including long-developed features like extension members, which have been in development for years. The conversation also turns to Razor Pages, which Dustin helps contribute to, and the dynamic of what should be language, what should be framework, and what should be tooling. And there's much more to come!