C# Online Compiler | .NET Fiddle

using System;

public class HttpRequest
{
	public string Username {get; set;}
	public string Password {get; set;}
}

public abstract class Handler
{
	private Handler next;
	
	public Handler(Handler next)
	{
		this.next = next;
	}
	
	protected abstract bool DoHandle(HttpRequest request);
	
	public void Handle(HttpRequest request) {
		if(DoHandle(request))
			return;
		
		if(next != null)
			next.Handle(request);
			
	}
}

public class Authenticator: Handler
{
	public Authenticator(Handler handler): base(handler)
	{
	}
	
	protected override bool DoHandle(HttpRequest request) 
	{
		Console.WriteLine("Authenticating request");
		return !(request.Username == "admin" && request.Password == "1234");
	}
}

public class Logger: Handler
{
	public Logger(Handler handler): base(handler)
	{
	}
	
	protected override bool DoHandle(HttpRequest request) 
	{
		Console.WriteLine("Logging request");
		return false;
	}
}

public class Compressor: Handler
{
	public Compressor(Handler handler): base(handler)
	{
	}
	
	protected override bool DoHandle(HttpRequest request) 
	{
		Console.WriteLine("Compressing request");
		return false;
	}
}

public class WebServer
{
	private Handler handler;
	
	public WebServer(Handler handler) 
	{
		this.handler = handler;
	}
	
	public void Handle(HttpRequest request) {
		handler.Handle(request);
	}
		
}

					
public class Program
{
	public static void Main()
	{
		var logger = new Logger(null);
		var compressor = new Compressor(logger);
		var authenticator = new Authenticator(compressor);
		var webserver = new WebServer(authenticator);
		webserver.Handle(new HttpRequest(){Username = "admin", Password = "1234"});
	}
}

        webserver.Handle(new HttpRequest(){Username = "admin", Password = "1234"});
 
using System;
​
public class HttpRequest
{
    public string Username {get; set;}
    public string Password {get; set;}
}
​
public abstract class Handler
{
    private Handler next;
    
    public Handler(Handler next)
    {
        this.next = next;
    }
    
    protected abstract bool DoHandle(HttpRequest request);
    
    public void Handle(HttpRequest request) {
        if(DoHandle(request))
            return;
        
        if(next != null)

Cached Result

606.00
10,605.00
100,495.00