This post originated from an RSS feed registered with .NET Buzz by Roy Osherove. Original Post: A simple question about overloading Feed Title: ISerializable Feed URL: http://www.asp.net/err404.htm?aspxerrorpath=/rosherove/Rss.aspx Feed Description: Roy Osherove's persistent thoughts Latest .NET Buzz Posts Latest .NET Buzz Posts by Roy Osherove Latest Posts From ISerializable

Given 3 classes: PersonBase, Employee and Manager:

class PersonBase { }

class Employee : PersonBase { }

class Manager : Employee { }

and given the following  methods:

public void Loop()

 {

     PersonBase[] people = new PersonBase[]{

                                 new PersonBase(),

                                 new Employee(),

                                 new Manager()

                                 };

     foreach (PersonBase pb in people)

     {

         doSomething(pb);

     }

 }

 void doSomething(PersonBase p)

 {

     Console.WriteLine("PersonBase");

 }

 void doSomething(Employee e)

 {

     Console.WriteLine("Employee");

 }

 void doSomething(Manager m)

 {

     Console.WriteLine("Manager");

 }

Why does only the first of the three “doSomething” overloads get called for all the objects in the array?

How could you force those methods to get called?

(Ignore the various class factory solutions out there.)