1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Linq;
 5 using System.Text;
 6 using System.Threading.Tasks;
 7 
 8 namespace SingletonPatternTest
 9 {
10     public class ReadWordService
11     {
12 #region
13         private static ReadWordService _instance;
 
14 
15         private ReadWordService() { }
16 
17         public static ReadWordService Instance()
18         {
19             if (_instance == null)
20             {
21                 _instance = new ReadWordService();
22             }
23             return _instance;
24         }
25 #endregion
26
 
 
27         public void GetReadWord()
28         {
29             while (true)
30             {
31                 var words = Console.ReadLine();
32 
33                 if (!string.IsNullOrEmpty(words) && words.Length > 10)
34                 {
35                     Console.WriteLine("你要輸出的內容是
 
" + words);
36                     break;
37                 }
38                 else
39                 {
40                     Console.WriteLine("不符合條件的輸入：" + words);
41                 }
42             }
43         }
44     }
45 }

控制檯實現部分

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace SingletonPatternTest
 8 {
 9     class Program
10     {
11         static void Main(string[] args)
12         {
13             // SingletonService.Instance().HellodWord();
14             ReadWordService.Instance().GetReadWord();
15             Console.ReadKey();
16 
17         }
18     }
19 }

顯示結果