Answer
Application Parts let MVC discover controllers, views, pages, and Tag Helpers from assemblies or Razor Class Libraries. They enable modular architectures, plugin systems, and dynamic feature loading.
Quick Answer
Application Parts are registered with ApplicationPartManager and contribute controllers, views, tag helpers, and other MVC components to the app. By default, the entry assembly is an Application Part. Add external assemblies to load controllers from plugins: builder.Services.AddControllersFromApplication(typeof(PluginAssembly).Assembly).
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ