C#程序设计 A3.3 类型转换（Console）

public A33Page(){while (true){Console.WriteLine("请输入一个整数：");string s = Console.ReadLine();if (int.TryParse(s, out int n)==false){continue;}if (n < 0) {Console.WriteLine("请重新输入");continue;}for (int i = 0; i <=n; i++) {Console.WriteLine(i+" ");}Console.ReadLine();}}