摘要：
1 using System; 2 using System.IO; 3 4 public class Program 5 { 6 public static void Main() 7 { 8 string path = @"C:\Users\user\Downloads"; 9 Console. 阅读全文
摘要：
1 using System; 2 3 public class Program 4 { 5 public static void Main() 6 { 7 object o ="3"; 8 int j = 4; 9 10 if(o is int i) 11 { 12 Console.WriteLi 阅读全文
摘要：
1 using System; 2 3 public class Program 4 { 5 public static string CardinalToOrdinal(int number) 6 { 7 switch(number) 8 { 9 case 11: 10 case 12: 11 c 阅读全文