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The Easiest Way to Learn Design Patterns in C#

Chain of Responsibility: Implementation and Example

Explore the Chain of Responsibility pattern by implementing a console app in C#. Understand how to set up handlers for authentication and authorization, delegate requests, and manage responses to build flexible and maintainable request processing systems.

We'll cover the following...

Implementing the Chain of Responsibility design pattern

To demonstrate the Chain of Responsibility pattern, we’ll use a simplified request processing example, similar to what ASP.NET Core middleware uses. However, because this is just a conceptual representation of request processing, we won’t have to build a fully-fledged web application. We’ll create a simple console app.

Creating a simple console app

Once created, we’ll add classes representing our Request and Response objects. Our Request object will look like this:

C#
namespace Chain_of_Responsibility_Demo;
internal class Request
{
  public string? Username { get; set; }
  public string? Password { get; set; }
  public string? Role { get; set; }
}

And here’s what our ...