摘要：
class A { public virtual void fun(int i) { Console.WriteLine(i); } public void fun2(A a) { a.fun(1); fun(5); } } class B:A { public override void fun(int i) { base.fun(i+1); } } class Program { static void Main(string[] args) { A a = new A(); B b = new B(); a.fun2(b); b.fun2(a); } } 阅读全文
