using System;

​

// https://stackoverflow.com/questions/154112/c-sharp-potential-interview-question-too-hard

public class Program

{

    public class A

{

   public void Foo( int n )

   {

      Console.WriteLine( "A::Foo" );

   }

}

​

public class B : A

{

   /* note that A::Foo and B::Foo are not related at all */

   public void Foo( double n )

   {

      Console.WriteLine( "B::Foo" );

   }

}

​

public static void Main( string[] args )

{

   B b = new B();

   /* which Foo is chosen? */

   b.Foo( 5 );

    ((A)b).Foo(5);

}

    // result: B::Foo

    // A::Foo

}