BlueSky’s AT Protocol (ATProto) provides a practical foundation for creating secure and interoperable decentralized applications, a crucial skill as the web transitions towards decentralization. In this session, we'll show you how to practically apply ATProto within the .NET ecosystem, demonstrating the tools and techniques for building decentralized apps using ASP.NET Core and C#. We'll cover the ATProto architecture, setting up .NET-based services, and implementing core features such as identity, data federation, and interaction protocols. Whether you're a seasoned .NET developer or new to ATProto, this talk will provide a practical roadmap to creating next-gen applications.