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)
// 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
supervisor = value;
// Using this we can apply for leave
public void ApplyLeave(Leave l)
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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.
If you like my articles, please visit my website for more: www.rahulrajatsingh.com[^]