How do .NET developers plan system architecture during the development process?

System architecture planning is the blueprint for the application. Developers choose between .NET Framework, .NET Core, or .NET 5+ based on the project's requirements. They define the application’s architecture style, such as MVC, layered, or microservices. Database structures, middleware, and third-party integrations are considered. Dot Net development also plan for scalability, security, and maintainability. Tools like UML diagrams are used to visualize the system. This phase ensures the system’s robustness and flexibility, allowing it to handle future updates and increasing workloads while delivering optimal performance to users.