try catch finally 样版

static void Main(string[] args)
        {                                                              
            while (true)
            {
                try
            {
                int i = Convert.ToInt32(Console.ReadLine());          
                Console.WriteLine("无异常");
            }
            catch (Exception)
            {
                Console.WriteLine("对不起，程序出错");
            }
            finally
            {
                Console.WriteLine("谢谢使用");
            }
            }
        }