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Posted 15 Nov 2012

Understanding and Implementing Chain of Responsibility Pattern in C#

, 15 Nov 2012
This article talks about the Chain of responsibility pattern.
using System;
using System.Collections.Generic;
using System.Text;

namespace ChainOfResponsibilityDemo
    public abstract class Employee
        // Every employee will have a supervisor
        protected Employee supervisor;

        // Event mechanism to know whenever a leave has been applied
        public delegate void OnLeaveApplied(Employee e, Leave l);
        public event OnLeaveApplied onLeaveApplied = null;

        // This will invoke events when the leave will be applied
        // i.e. the actual item will be handed over to the hierarchy of
        // concrete handlers.
        public void LeaveApplied(Employee s, Leave leave)
            if (onLeaveApplied != null)
                onLeaveApplied(this, leave);

        // This is the function which concrete handlers will use to take 
        // action, if they are able to take actions.
        public abstract void ApproveLeave(Leave leave);

        // getter to get the supervisor of current employee
        public Employee Supervisor
                return supervisor;
                supervisor = value;
        // Using this we can apply for leave
        public void ApplyLeave(Leave l)
            LeaveApplied(this, l);

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About the Author

Rahul Rajat Singh
Software Developer (Senior)
India India

I Started my Programming career with C++. Later got a chance to develop Windows Form applications using C#. Currently using C#, ASP.NET & ASP.NET MVC to create Information Systems, e-commerce/e-governance Portals and Data driven websites.

My interests involves Programming, Website development and Learning/Teaching subjects related to Computer Science/Information Systems. IMO, C# is the best programming language and I love working with C# and other Microsoft Technologies.

  • Microsoft Certified Technology Specialist (MCTS): Web Applications Development with Microsoft .NET Framework 4
  • Microsoft Certified Technology Specialist (MCTS): Accessing Data with Microsoft .NET Framework 4
  • Microsoft Certified Technology Specialist (MCTS): Windows Communication Foundation Development with Microsoft .NET Framework 4

If you like my articles, please visit my website for more:[^]

  • Microsoft MVP 2015

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