// Non-Dangerous program.
// Compiles and runs.
// M2 is declared new in B.
// A.M2 is not virtual.
using System;
// New version of A
class A {
public void M1(){
Console.WriteLine("Method 1");
this.M2();
}
// New method in this version.
// Same name as the dangerous operation in subclass B
// M2 is not virtual.
public void M2(){
Console.WriteLine("M2 in new version of A");
}
}
class B: A {
public new void M2(){
Console.WriteLine("Dangerous Method 2");
}
}
class Client{
public static void Main(){
A a = new B();
B b = new B();
a.M1(); // Nothing dangerous expected
// Will call a.M2 - the non-dangerous version
a.M2(); // Makes sense when M2 exists in class A
// Will call a.M2 - the non-dangerous version
b.M2(); // Expects dangerous operation
}
} |