{}
// Online C# Editor for free
// Write, Edit and Run your C# code using C# Online Compiler
using System;
public class HelloWorld
{
public static void Main(string[] args)
{
(new B()).test();
(new C()).test(new B());
}
}
public class A {
protected int f = 1;
}
public class B : A {
public void test() {
Console.WriteLine(f);
}
}
public class C : A {
public void test(B b) {
Console.WriteLine(b.f);
}
}