.NET 10 introduces significant authentication and authorization improvements including built-in passkey support in ASP.NET Core Identity for phishing-resistant authentication, C# 14 extension members that simplify claims management with cleaner syntax, new observability metrics for tracking authentication events and performance, and a breaking change where API endpoints now correctly return 401/403 status codes instead of redirecting to login pages. The release also includes enhanced documentation for securing Blazor Web Apps with OpenID Connect.
Table of contents
Passkey Support in ASP.NET Core IdentityStreamlining Claims with C# 14 Extension MembersNew Authentication and Authorization MetricsA Key Breaking Change: Unauthorized Access to API EndpointsImproved Blazor OIDC Docs and SamplesA Significant UpgradeSort: