写了点代码，初次体验到C#范型的魅力
    class Program
    {
        static void WriteSometing<T>(T x,T y)
        {
            if (typeof(T) == typeof(int))
                Console.WriteLine(x);
            if (typeof(T) == typeof(string))
                Console.WriteLine(y);
        }

        static void Main(string[] args)
        {
            WriteSometing<int>(0, 9);
            WriteSometing<string>("0", "9");

            WriteSometing(0, 9);
            WriteSometing("0", "9");
           
            Console.ReadLine();
        }
    }