要从 OrderedDictionary 中删除所有元素，代码如下：示例 实时演示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);       }       Console.WriteLine("元素数量..."); 阅读更多

要检查 ListDictionary 是否已同步，代码如下：示例 实时演示using System; using System.Collections; using System.Collections.Specialized; public class Demo {    public static void Main(){       ListDictionary dict = new ListDictionary();       dict.Add("1", "SUV");       dict.Add("2", "Sedan");       dict.Add("3", "Utility Vehicle");       dict.Add("4", "Compact Car");       dict.Add("5", "SUV");       dict.Add("6", "Sedan");       dict.Add("7", "Utility Vehicle");       dict.Add("8", "Compact Car");       dict.Add("9", "Crossover");       dict.Add("10", "Electric Car");       Console.WriteLine("ListDictionary 元素...");       foreach(DictionaryEntry d ... 阅读更多

要检查 ListDictionary 是否为只读，代码如下：示例 实时演示using System; using System.Collections; using System.Collections.Specialized; public class Demo {    public static void Main(){       ListDictionary dict1 = new ListDictionary();       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("ListDictionary1 元素...");       foreach(DictionaryEntry d in dict1){          Console.WriteLine(d.Key + " " + d.Value);       }       Console.WriteLine("ListDictionary1 是否具有..."); 阅读更多

要从 SortedList 中删除所有元素，代码如下：示例 实时演示using System; using System.Collections; public class Demo {    public static void Main(String[] args){       SortedList sortedList = new SortedList();       sortedList.Add("A", "1");       sortedList.Add("B", "2");       sortedList.Add("C", "3");       sortedList.Add("D", "4");       sortedList.Add("E", "5");       sortedList.Add("F", "6");       sortedList.Add("G", "7");       sortedList.Add("H", "8");       sortedList.Add("I", "9");       sortedList.Add("J", "10");       Console.WriteLine("SortedList 元素...");       foreach(DictionaryEntry d in sortedList){       ... 阅读更多

要从 HashSet 中删除所有元素，代码如下：示例 实时演示using System; using System.Collections.Generic; public class Demo {    public static void Main(String[] args){       HashSet set1 = new HashSet();       set1.Add("A");       set1.Add("B");       set1.Add("C");       set1.Add("D");       set1.Add("E");       set1.Add("F");       set1.Add("G");       set1.Add("H");       Console.WriteLine("HashSet1 中的元素...");       foreach (string res in set1){          Console.WriteLine(res);       }       HashSet set2 = new HashSet();     ... 阅读更多

要获取 OrderedDictionary 的只读副本，代码如下：示例 实时演示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 元素...");       foreach(DictionaryEntry d in dict1){          Console.WriteLine(d.Key + " " + d.Value);       }       OrderedDictionary dict2 ... 阅读更多

要检查两个 Tuple 对象是否相等，代码如下：示例 实时演示using System; public class Demo {    public static void Main(String[] args){       var tuple1 = Tuple.Create(150, 400, 500, 700, 100, 1200, 1500);       var tuple2 = Tuple.Create(150, 400, 500, 700, 100, 1200, 1500);       Console.WriteLine("Tuple1 是否等于 Tuple2？= "+tuple1.Equals(tuple2));    } }输出这将产生以下输出：Tuple1 是否等于 Tuple2？= True示例让我们看看另一个示例： 实时演示using System; public class Demo {    public static void Main(String[] args){       var tuple1 = ... 阅读更多

要检查两个 StringBuilder 对象是否相等，代码如下：示例 实时演示using System; using System.Text; public class Demo {    public static void Main(String[] args){       StringBuilder strBuilder1 = new StringBuilder("Tim");       StringBuilder strBuilder2 = new StringBuilder("Tom");       StringBuilder strBuilder3 = new StringBuilder();       strBuilder2 = strBuilder3;       Console.WriteLine("StringBuilder3 是否等于 StringBuilder2？= "+strBuilder3.Equals(strBuilder2));    } }输出这将产生以下输出：StringBuilder3 是否等于 StringBuilder2？= True示例让我们看看另一个示例： 实时演示using System; using System.Text; public class Demo {    public static void ... 阅读更多

要检查两个 String 对象是否具有相同的值，代码如下：示例 实时演示using System; public class Demo {    public static void Main(String[] args){       string str1 = "John";       string str2 = "John";       Console.WriteLine("字符串 1 = "+str1);       Console.WriteLine("字符串 2 = "+str2);       Console.WriteLine("字符串 1 等于字符串 2：{0}", str1.Equals(str2));    } }输出这将产生以下输出：字符串 1 = John 字符串 2 = John 字符串 1 等于字符串 2：True示例让我们看看另一个示例： 实时演示using System; public ... 阅读更多

要为 ArrayList 创建一个只读包装器，代码如下 -示例 现场演示使用 System；使用 System.Collections；public class Demo {    public static void Main(){       ArrayList list = new ArrayList();       list.Add("One");       list.Add("Two");       list.Add("Three");       list.Add("Four");       list.Add("Five");       list.Add("Six");       list.Add("Seven");       list.Add("Eight");       Console.WriteLine("ArrayList 元素...");       foreach(string str in list){          Console.WriteLine(str);       }       Console.WriteLine("ArrayList 是否为只读？ = "+list.IsReadOnly);    } }输出这将产生... 阅读更多