abstract class A
{
public virtual void Meto()
{
Console.WriteLine("A");
}
}
class B : A
{
public new void Meto()
{
Console.WriteLine("B");
}
}
class Program
{
static void Main(string[] args)
{
A b = new B();
b.Meto();
B bb = new B();
bb.Meto();
Console.ReadLine();
}
}