A SP.NET Core is a cross-platform, high-performance, open-source framework for building modern, cloud-based, internet-connected applications. One of the core building blocks of an ASP.NET Core application is the ControllerBase class, which serves as the base class for controllers that handle HTTP requests.   What is the ControllerBase class? The ControllerBase class is a base class for controllers in ASP.NET Core that handles HTTP requests. It provides a set of common properties and methods that are used by controllers to handle HTTP requests and generate HTTP responses. The ControllerBase class does not implement any specific behavior or logic, but instead provides a set of common methods and properties that can be used by derived classes. The ControllerBase class is defined in the Microsoft.AspNetCore.Mvc namespace, and is part of the ASP.NET Core MVC framework. It is derived from the Controller class, and provides a simpler, lighter-weight alternative for building APIs and micr...