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What is Routing in ASP.NET Core?

Entry .NET Core
Quick Answer Routing maps incoming HTTP requests to handler endpoints (controller actions, Razor Pages, minimal API handlers). ASP.NET Core uses endpoint routing: route matching and endpoint execution are separate phases. Routes are defined via attribute routing ([Route], [HttpGet]) or convention-based routing. Route templates ({controller}/{action}/{id?}) define the URL pattern.

Answer

Routing maps incoming HTTP requests (URL + HTTP method) to application endpoints such as controllers, actions, Razor Pages, or minimal APIs.

ASP.NET Core uses Endpoint Routing, which matches routes early in the pipeline, attaches metadata (like authorization policies), and then later executes the matched endpoint. It supports route templates, constraints, defaults, and custom route patterns.

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