装箱和拆箱

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
           
            /*PrintStr();
            PrintNum();*/
            int i = 10;
            int j = 20;
            int s = 30;
            //Console.WriteLine("i的值为{0}，j的值为{1}，s的值为{2}",i,j,s);
            Console.WriteLine("i的值为{0}，j的值为{1}，s的值为{2}", i.ToString(), j.ToString(), s.ToString());
           
            Console.ReadKey();
        }
        private static void PrintStr()
        {
            string name = "张三";
            Console.WriteLine(name);
        }

        private static void PrintNum()
        {
            int age = 20;
            Console.WriteLine(age);
        }
    }
}