异常语句

/异常语句
            /*
            try
            {
                int a = int.Parse(Console.ReadLine());
            }
            catch (Exception ex)
            {
                //throw ex;
                Console.WriteLine("出现错误了" + ex.Message);
            }
            finally //可省略
            {
                Console.WriteLine("hollo");
            }
             */
            //实例
            //必须通过new初始化，后面括号实际是构造函数
            //DateTime实际是一个类-class
            int cuo = 0;
            Console.Write("输入日期");
            string s = Console.ReadLine();
            try
            {
                //DateTime dt = new DateTime(2015, 9, 14);
                DateTime dt = DateTime.Parse(s);
            }
            catch (Exception ex)
            {
                Console.WriteLine("不是");
                cuo = 1;
            }
            if (cuo == 0)
            {
                Console.WriteLine("正确");
            }

            //Console.Write(dt.ToString());
            Console.ReadLine();