In a multilevel hierarchy, the system executes the first override-virtual method found
in the hierarchy.
using System;
class BaseClass {
// Create virtual method in the base class.
public virtual void who() {
Console.WriteLine("who() in BaseClass");
}
}
class Derived1 : BaseClass {
// 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().
}
class MainClass {
public static void Main() {
Derived3 dOb = new Derived3();
BaseClass baseRef; // a base-class reference
baseRef = dOb;
baseRef.who(); // calls Derived1's who()
}
}
