要将指定集合的元素添加到 List 的末尾，代码如下所示：示例 在线演示using System; using System.Collections.Generic; public class Demo {    public static void Main(String[] args){       List list = new List();       list.Add("Andy");       list.Add("Gary");       list.Add("Katie");       list.Add("Amy");       Console.WriteLine("List 中的元素...");       foreach (string res in list){          Console.WriteLine(res);       }       string[] strArr = { "John", "Jacob" };       list.AddRange(strArr);       Console.WriteLine("List 中的元素...已更新"); ... 阅读更多

要将新节点或值添加到 LinkedList 的开头，代码如下所示：示例 在线演示using System; using System.Collections.Generic; public class Demo {    public static void Main(){       LinkedList list = new LinkedList();       list.AddLast("A");       list.AddLast("B");       list.AddLast("C");       list.AddLast("D");       list.AddLast("E");       list.AddLast("F");       Console.WriteLine("节点数量 = " + list.Count);       Console.WriteLine("LinkedList 中的元素...");       foreach (string res in list){          Console.WriteLine(res);       }       list.AddLast("G");   ... 阅读更多

要检查 OrderedDictionary 集合是否为只读，代码如下所示：示例 在线演示using System; using System.Collections; using System.Collections.Specialized; public class Demo {    public static void Main(){       OrderedDictionary dict = new OrderedDictionary();       dict.Add("1", "One");       dict.Add("2", "Two");       dict.Add("3", "Three");       dict.Add("4", "Four");       dict.Add("5", "Five");       dict.Add("6", "Six");       dict.Add("7", "Seven");       dict.Add("8", "Eight");       ICollection col = dict.Values;       String[] strVal = new String[dict.Count];       col.CopyTo(strVal, 0);       Console.WriteLine("显示 ... 阅读更多

要将指定 Decimal 值转换为等效的 16 位无符号整数，代码如下所示：示例 在线演示using System; public class Demo {    public static void Main() {       Decimal val = 875.647m;       Console.WriteLine("Decimal 值 = "+val);       ushort res = Decimal.ToUInt16(val);       Console.WriteLine("16 位无符号整数 = "+res);    } }输出这将产生以下输出：Decimal 值 = 875.647 16 位无符号整数 = 875示例让我们看另一个示例： 在线演示using System; public class Demo {    public static void Main() {       Decimal val = 0.001m;       Console.WriteLine("Decimal 值 ... 阅读更多

要检查 OrderedDictionary 集合是否包含特定键，代码如下所示：示例 在线演示using System; using System.Collections; using System.Collections.Specialized; public class Demo {    public static void Main(){       OrderedDictionary dict = new OrderedDictionary();       dict.Add("1", "One");       dict.Add("2", "Two");       dict.Add("3", "Three");       dict.Add("4", "Four");       dict.Add("5", "Five");       dict.Add("6", "Six");       dict.Add("7", "Seven");       dict.Add("8", "Eight");       ICollection col = dict.Values;       String[] strVal = new String[dict.Count];       col.CopyTo(strVal, 0);     ... 阅读更多

要获取此实例的哈希码，代码如下所示：示例 在线演示using System; public class Demo {    public static void Main() {       string[] arr = {"tom", "amit", "kevin", "katie"};       Type t1 = arr.GetType();       Type t2 = t1.GetElementType();       Console.WriteLine("类型 = "+t2.ToString());       Console.WriteLine("哈希码 = "+t1.GetHashCode());    } }输出这将产生以下输出：类型 = System.String 哈希码 = 9144789示例让我们看另一个示例： 在线演示using System; public class Demo {    enum Vehicle {Car, Bus, Bike, Airplane}    public static void ... 阅读更多

要向 Hashtable 添加元素，代码如下所示：示例 在线演示using System; using System.Collections; public class Demo {    public static void Main(){       Hashtable hash = new Hashtable(10);       hash.Add("1", "A");       hash.Add("2", "B");       hash.Add("3", "C");       hash.Add("4", "D");       hash.Add("5", "E");       hash.Add("6", "F");       hash.Add("7", "G");       hash.Add("8", "H");       hash.Add("9", "I");       hash.Add("10", "J");       Console.WriteLine("Hashtable 的键值对...");       foreach(DictionaryEntry entry in hash){   ... 阅读更多

要获取 C# 中当前类型的特定字段，代码如下所示：示例 在线演示using System; using System.Reflection; public class Demo {    public static void Main() {    Type type = typeof(Subject);       try {          FieldInfo fieldInfo = type.GetField("SubName");          Console.WriteLine("FieldInfo = {0}", fieldInfo);       }       catch (ArgumentNullException e) {          Console.Write("{0}", e.GetType(), e.Message);       }    } } public class Subject {    public string SubName = "Science"; }输出这将产生以下输出：FieldInfo = ... 阅读更多

向ListDictionary中添加指定的键值对，代码如下：示例 在线演示使用 System; using System.Collections; using System.Collections.Specialized; public class Demo { public static void Main(){ ListDictionary dict = new ListDictionary(); dict.Add("1", "One"); dict.Add("2", "Two"); dict.Add("3", "Three"); dict.Add("4", "Four"); dict.Add("5", "Five"); Console.WriteLine("ListDictionary 键值对..."); IDictionaryEnumerator demoEnum = dict.GetEnumerator(); while (demoEnum.MoveNext()) Console.WriteLine("键 = " + demoEnum.Key + ", 值 = " + demoEnum.Value); } ... 阅读更多

要获取当前枚举类型中常量的值数组，代码如下：示例 在线演示使用 System; public class Demo { enum Vehicle {Car, Bus, Bike, Airplane} public static void Main() { try { Type type = typeof(int); string[] str = type.GetEnumNames(); Console.WriteLine("GetEnumNames() 返回的常量名称 = " + str); Type type2 = type.GetEnumUnderlyingType(); Console.Write("枚举的基础类型 = "+type2); Array arrObj = type.GetEnumValues(); ... 阅读更多