(C#)一道看似简单却很难答得完全正确的关于多态的问题

[csharp] 
/*关于virtual,overried,new在方法和属性上以this,base形式输出的问题
 *问主程序的输出是什么
 */ 
 
using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
 
namespace ConsoleApplication2 
{ 
    class Program 
    { 
        static void Main(string[] args) 
        { 
            A a1 = new B(); 
            a1.AM1(); 
            B b1 = (B)a1; 
            b1.AM1(); 
 
            Console.WriteLine(); 
 
            A a2 = new B(); 
            a2.AM2(); 
            B b2 = (B)a2; 
            b2.AM2(); 
        } 
    } 
 
    class A 
    { 
        public virtual int i { get; protected set; } 
        public A() 
        { 
            this.i = 9; 
        } 
 
        public virtual void AM1() 
        { 
            this.i = this.i + 10000; 
            Console.WriteLine("A.this.i="+ this.i); 
        } 
 
        public virtual void AM2() 
        { 
            this.i = this.i + 10000; 
            Console.WriteLine("A.this.i=" + this.i); 
        } 
    } 
    class B : A 
    { 
        public override int i { get; protected set; } 
        public B() 
            : base() 
        { 
            this.i = 5; 
        } 
 
        public override void AM1() 
        { 
            Console.WriteLine("B.this.i=" + this.i); 
            Console.WriteLine("B.base.i=" + base.i); 
            this.i = this.i + 100; 
            base.i = base.i + 1000; 
            Console.WriteLine("B.this.i=" + this.i); 
            Console.WriteLine("B.base.i=" + base.i); 
        } 
 
        public new void AM2() 
        { 
            Console.WriteLine("B.this.i=" + this.i); 
            Console.WriteLine("B.base.i=" + base.i); 
            this.i = this.i + 100; 
            base.i = base.i + 1000; 
            Console.WriteLine("B.this.i=" + this.i); 
            Console.WriteLine("B.base.i=" + base.i); 
        } 
    } 
} 
/* output
B.this.i=5
B.base.i=0
B.this.i=105
B.base.i=1000
B.this.i=105
B.base.i=1000
B.this.i=205
B.base.i=2000
 
A.this.i=10005
B.this.i=10005
B.base.i=0
B.this.i=10105
B.base.i=1000
*/ 
 
/*关于virtual,overried,new在方法和属性上以this,base形式输出的问题
 *问主程序的输出是什么
 *加了些log后
 */ 
using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
 
namespace ConsoleApplication2 
{ 
    class Program 
    { 
        static void Main(string[] args) 
        { 
            A a1 = new B(); 
            a1.AM1(); 
            B b1 = (B)a1; 
            b1.AM1(); 
 
            Console.WriteLine(); 
 
            A a2 = new B(); 
            a2.AM2(); 
            B b2 = (B)a2; 
            b2.AM2(); 
        } 
    } 
 
    class A 
    { 
        private int tmp; 
        public virtual int i 
        { 
            get 
            { 
                Console.WriteLine("      A.i.get=" + this.tmp); 
                return this.tmp; 
        &nbs

补充：软件开发 , C# ,