函数引用问题
```c#
using System;
namespace _001_
{
class Program
{
static void Main()
{
Program n = new Program();//在这里//
int x =200;
int y = 100;
n.num(ref x,ref y);
Console.WriteLine(x);
Console.WriteLine(y);
}
public void num(ref int x,ref int y)
{
int temp;
temp = x;
x=y;
y = temp;
}
}
}
请问中间的 Program n = new Program(); 是什么意思,属于什么用法?
求大神回答