ASP.NET Core 10: Clearer separation between middlewares and endpoints for more predictable routing

This article discusses a key improvement in ASP.NET Core 10 that addresses common middleware ordering issues in web applications. Previously, developers had to carefully order middleware like UseAuthentication() and UseAuthorization() relative to UseRouting() to avoid silent authentication failures. ASP.NET Core 10 introduces clearer separation between middlewares and endpoints by making routing implicit, so endpoint metadata is always available to authentication and authorization middleware regardless of registration order. The article explains the old problem, shows code examples contrasting before and after ASP.NET Core 10 behavior, and discusses implications for custom middleware. It is a technical guide focused on ASP.NET Core development and framework improvements.