命名空間已經包含了“Program”的定義。怎麽解決？

{

public?class?Program

{

public?int?x?=?3;public?int?y?=?5;?public?int?z?=?0;

public?int?Function(int?a,int?b?)

{

int?c;

c?=?a?+?b;

return?c;//Function?<-?c

}

public?static?void?Main(string?[]?args)

{

Program?Prog?=?new?Program();?//new?class?Program?{}

Prog.z?=?Prog.x?+?Prog.y;

Console.WriteLine("結果："?+?Prog.z);

int?MessagSho?=?Prog.Function(Prog.x,?Prog.y);

MessageBox.Show(String.Concat(MessagSho));

}}}