c#中的两个数值交换问题
c#中的两个数值交换问题新手提问,各位大哥大姐帮忙看看怎么回事! 谢谢!

最后的数值怎么交换不过来? 在线等!
using System;
class Program
{
private static void change(int a, int b)
{
int c;
c = a;
a = b;
b = c;
}
private static void Main(string[] args)
{
Console.WriteLine( "please input a: ");
int a=Convert.ToInt16( Console.ReadLine());
Console.WriteLine( "please input b: ");
int b=Convert.ToInt16( Console.ReadLine());
change(a,b);
Console.WriteLine( "a={0},b={1} ",a,b);

}


}


[解决办法]
private static void change(ref int a, ref int b)
{
int c;
c = a;
a = b;
b = c;
}

change(ref a, ref b);