static void Main(string[] args)
        {
            Console.WriteLine(getStringOne());
            Console.WriteLine(getStringTwo());
            Console.ReadLine();//该条语句是使控制台不会一闪而过
        }
        /// <summary>
        /// 返回string数据的方法
        /// </summary>
        /// <returns>string</returns>
        public static string getStringOne()
        {
            /*
             * 只是返回一个字符串
             */
            string str = "This Is A Demo!";
            return str;
        }
        #region
        public static string getStringTwo()
        {
            string str = "This Is A Demo Too!";
            return str;
        }
       #endregion