Mega Code Archive
A multilevel hierarchy
<![CDATA[
/*
C#: The Complete Reference
by Herbert Schildt
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
/* In a multilevel hierarchy, the
first override of a virtual method
that is found while moving up the
heirarchy is the one executed. */
using System;
class Base {
// Create virtual method in the base class.
public virtual void who() {
Console.WriteLine("who() in Base");
}
}
class Derived1 : Base {
// Override who() in a derived class.
public override void who() {
Console.WriteLine("who() in Derived1");
}
}
class Derived2 : Derived1 {
// This class also does not override who().
}
class Derived3 : Derived2 {
// This class does not override who().
}
public class NoOverrideDemo2 {
public static void Main() {
Derived3 dOb = new Derived3();
Base baseRef; // a base-class reference
baseRef = dOb;
baseRef.who(); // calls Derived1's who()
}
}
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