class Program
    {
        static void Main(string[] args)
        {
            string[] name = {" 蒙奇"," 卡卡"," 整啊大事"," 火影" };
            string s;
   
            for (int i = 0; i < name.Length; i++)
            {
                Console.Write(name[i]);
                s=Fanhui(name.Length);
                Console.WriteLine("s");


            }
            Console.ReadKey();
        }




        public static string Fanhui (int s)
        {
            int i = 1;
            while(i<s)
            //for (int i = 1; i < s; i++)
            {
                i++;
                return "|";
            }
            
        }



    }


总是提示错误： 并非所有的代码路径都返回值      
求帮帮忙啊