C# 是创新性的新式编程语言

				using System;
				namespace TestInFace
				{
					
					interface IChangeBoxedPoint
					{
						void Change(Int32 x,Int32 y);
					}
					public struct Point:IChangeBoxedPoint
					{
						public Int32 x,y;
						public Point(Int32 x,Int32 y)
						{
							this.x=x;
							this.y=y;
						}
						public void Change(Int32 x,Int32 y)
						{
							this.x=x;
							this.y=y;
						}
						public override String ToString()
						{
							return String.Format("({0},{1})",x,y);
						}
						
					}
					class Class1
					{
						[STAThread]
						static void Main(string[] args)
						{
							Point p=new Point();
							p.x=p.y=1;
							Console.WriteLine(p);
				
							p.Change(2,2);
							Console.WriteLine(p);
				
							Object o=p;
							Console.WriteLine(o);
				
							((Point)o).Change(3,3);//没有达到期望
							Console.WriteLine(o);
				
							((IChangeBoxedPoint)o).Change(5,5);//达到期望(使用接口改变已装箱值类型中的字段)
							Console.WriteLine(o);
				
							
						}
					}
				}