C＃停止用户输入字符/字符串而不是整数

Question

我要求用户为他们的年龄输入一个int，但程序在输入字符串时会崩溃（显然）。

我如何允许他们输入字符/字符串，但程序显示有趣的消息然后退出？

这是我到目前为止所得到的：

      Console.WriteLine("Please can you enter your age");
        int userage = Convert.ToInt32(Console.ReadLine());
        if (userage < 16)
        {

            var underage = new underage();
            underage.text();
        }
        else if (userage>122)
        {
            Console.WriteLine("No one has ever reached this age and so you can't possibly be this old");
            Console.WriteLine("Please enter a different age next time!");
            Console.WriteLine("Unless you really are this old, in which case don't work!!");
            Console.WriteLine("Press any key to exit the program.\n");
            Environment.Exit(0);
        }
        else if(userage<122)
        {
            Console.WriteLine("Ah brilliant, you are old enough to use our services\n");
            Console.WriteLine("We shall continue as first planned\n");
        }
        else
        {

        }

Answer 1

尝试：

            Console.WriteLine("Please can you enter your age");
            int userage;
            if (int.TryParse(Console.ReadLine(), out userage))
            {
               //your if block
            }
            else
            {
               Console.WriteLine("Your input is funny and I am a funny message\n");
               Environment.Exit(0);
            }