/*
C#: The Complete Reference
by Herbert Schildt
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Demonstrate is.
using System;
class A {}
class B : A {}
public class UseIs {
public static void Main() {
A a = new A();
B b = new B();
if(a is A) Console.WriteLine("a is an A");
if(b is A)
Console.WriteLine("b is an A because it is derived from A");
if(a is B)
Console.WriteLine("This won't display -- a not derived from B");
if(b is B) Console.WriteLine("B is a B");
if(a is object) Console.WriteLine("a is an Object");
}
}
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