static void Main(string[] args)
{
int[] arr = new int[] { 1, 2, 3, 4, 5, 6, 7 };
ReverseAndPrint <string>(new string[] { "1", "2", "3" });
ReverseAndPrint(arr);//这里编译器可 推断类型
//扩展方法
var intH = new Hodler <int>(1, 2, 3);
var stringH = new Hodler <string>("1", "2", "3");
intH.Print();
stringH.Print();
Console.ReadKey();
}
public static void Print <T>(this Hodler <T> hodler) //this关键字和类型
{
T[] vals = hodler.GetValue();
Console.WriteLine("{0},{1},{2}", vals[0], vals[1], vals[2]);
}