下面程序运行结果是abstract class BaseClass{ public virtual void MethodA() { Console.WriteLine("BaseClass"); } public virtual void MethodB() { }} class Class1 : BaseClass { new public void MethodA() { Console.WriteLine("Class1"); }public override void MethodB() { } } class Class2 : Class1 { new public void MethodB() { }static void Main(string[] args){Class2 A = new Class2();A.MethodA();A.MethodB();}}