在C#中获取OrderedDictionary的只读副本

要获取OrderedDictionary的只读副本，代码如下-

示例

using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
   public static void Main(){
      OrderedDictionary dict1 = new OrderedDictionary();
      dict1.Add("A", "Books");
      dict1.Add("B", "Electronics");
      dict1.Add("C", "Smart Wearables");
      dict1.Add("D", "Pet Supplies");
      dict1.Add("E", "Clothing");
      dict1.Add("F", "Footwear");
      Console.WriteLine("OrderedDictionary1 elements...");
      foreach(DictionaryEntry d in dict1){
         Console.WriteLine(d.Key + " " + d.Value);
      }
      OrderedDictionary dict2 = new OrderedDictionary();
      dict2.Add("1", "One");
      dict2.Add("2", "Two");
      dict2.Add("3", "Three");
      dict2.Add("4", "Four");
      dict2.Add("5", "Five");
      dict2.Add("6", "Six");
      Console.WriteLine("\nOrderedDictionary2 elements...");
      foreach(DictionaryEntry d in dict2){
         Console.WriteLine(d.Key + " " + d.Value);
      }
      Console.WriteLine("\nIs OrderedDictionary1 equal to OrderedDictionary2? = "+(dict1.Equals(dict2)));
      OrderedDictionary orderedDict = dict2.AsReadOnly();
      Console.WriteLine("Is OrderedDictionary read-only? = "+orderedDict.IsReadOnly);
   }
}

输出结果

这将产生以下输出-

OrderedDictionary1 elements...
A Books
B Electronics
C Smart Wearables
D Pet Supplies
E Clothing
F Footwear
OrderedDictionary2 elements...
1 One
2 Two
3 Three
4 Four
5 Five
6 Six
Is OrderedDictionary1 equal to OrderedDictionary2? = False
Is OrderedDictionary read-only? = True

示例

让我们看另一个例子-

using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
   public static void Main(){
      OrderedDictionary dict = new OrderedDictionary();
      dict.Add("A", "Books");
      dict.Add("B", "Electronics");
      dict.Add("C", "Smart Wearables");
      dict.Add("D", "Pet Supplies");
      dict.Add("E", "Clothing");
      dict.Add("F", "Footwear");
      Console.WriteLine("OrderedDictionary元素...-");
      foreach(DictionaryEntry d in dict){
         Console.WriteLine(d.Key + " " + d.Value);
      }
      OrderedDictionary orderedDict = dict.AsReadOnly();
      Console.WriteLine("Is OrderedDictionary read-only? = "+orderedDict.IsReadOnly);
   }
}

输出结果

这将产生以下输出-

OrderedDictionary元素...-
A Books
B Electronics
C Smart Wearables
D Pet Supplies
E Clothing
F Footwear
Is OrderedDictionary read-only? = True