Learn how to read request headers and work with optional data that is passed between the server and client in ASP.NET Core 5 applications. ASP.NET Core MVC 5 is a lightweight, open source framework ...

ASP.NET MVC filters can be defined once and used in multiple places. Because ASP.NET MVC also provides the ability to create custom filters, it's good practice to learn how to make them and use them ...

You can take advantage of custom route constraints in ASP.NET Core to validate route values and avoid passing unwanted or unnecessary requests to action methods. Route constraints in ASP.NET Core are ...

[Editor's note: Peter rewrote this article after a reader pointed out he over-engineered his original solution. ("What can I say: The code worked -- I just didn't need nearly as much code as I thought ...