The article discusses the challenges faced in managing state transitions in .NET applications, such as scattered logic, lack of structure, difficult testing, concurrency issues, and missing auditability. To address these issues, the author introduces FlowLite, a modern Finite State Machine (FSM) engine designed for .NET applications. FlowLite offers features like flexible configuration, asynchronous and thread-safe transition execution, custom logic hooks, and support for state persistence, making it suitable for managing state transitions in complex systems. The article provides a step-by-step guide on how to define state transitions using FlowLite and highlights its testing, diagnostics, and visualization capabilities to enhance observability and maintainability in state management.