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Working Principle

ExtCore is included into a project using two extension methods: AddExtCore and UseExtCore.

First of all, inside the AddExtCore method ExtCore discovers and loads the assemblies (using the implementation of the IAssemblyProvider interface). When the assemblies are discovered and loaded it caches it inside the ExtensionManager static class. This class is the entry point for the ExtCore type discovery mechanism, all extensions can use it to get the information about each other.

Then, using the AddExtCore and UseExtCore methods, ExtCore executes user actions (code fragments) from all the extensions inside the ConfigureServices and Configure methods. These actions are defined by the implementations of the IConfigureServicesAction and IConfigureAction interfaces and allows developer to specify the execution order by using the Priority property. This is one of the key features, because it allows the extensions to execute their own code during the web application initialization and startup. They can register services, add middleware etc.

ExtCore.Mvc extension also defines two more action interfaces which might be used to configure MVC: IAddMvcAction and IUseMvcAction ones.

ExtCore.Mvc extension discovers all the views (added as resources and/or precompiled) and static content (added as resources) and make it accessible using the custom implementation of the IFileProvider interface.