To check if the StringDictionary contains a specific value, the code is as follows −Example Live Demousing System; using System.Collections; using System.Collections.Specialized; public class Demo {    public static void Main(){       StringDictionary strDict1 = new StringDictionary();       strDict1.Add("A", "John");       strDict1.Add("B", "Andy");       strDict1.Add("C", "Tim");       strDict1.Add("D", "Ryan");       strDict1.Add("E", "Kevin");       strDict1.Add("F", "Katie");       strDict1.Add("G", "Brad");       Console.WriteLine("StringDictionary1 elements...");       foreach(DictionaryEntry d in strDict1){          Console.WriteLine(d.Key + " " + d.Value);       }   ... Read More

To check if the StringDictionary contains a specific key, the code is as follows −Example Live Demousing System; using System.Collections; using System.Collections.Specialized; public class Demo {    public static void Main(){       StringDictionary strDict1 = new StringDictionary();       strDict1.Add("A", "John");       strDict1.Add("B", "Andy");       strDict1.Add("C", "Tim");       strDict1.Add("D", "Ryan");       strDict1.Add("E", "Kevin");       strDict1.Add("F", "Katie");       strDict1.Add("G", "Brad");       Console.WriteLine("StringDictionary1 elements...");       foreach(DictionaryEntry d in strDict1){          Console.WriteLine(d.Key + " " + d.Value);       }   ... Read More

To check if two SortedSet objects are equal, the code is as follows −Example Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main(){       SortedSet set1 = new SortedSet();       set1.Add(100);       set1.Add(200);       set1.Add(300);       set1.Add(400);       Console.WriteLine("Elements in SortedSet1...");       foreach (int res in set1) {          Console.WriteLine(res);       }       Console.WriteLine("Does the SortedSet1 contains the element 400? = "+set1.Contains(400));       SortedSet set2 = new SortedSet();       set2.Add(100);   ... Read More

To check if Hashtable contains a specific key, the code is as follows −Exampleusing System; using System.Collections; public class Demo {    public static void Main()    public static void Main(){       Hashtable hash = new Hashtable();       hash.Add("One", "Katie");       hash.Add("Two", "John");       hash.Add("Three", "Barry");       hash.Add("Four", "Mark");       hash.Add("Five", "Harry");       hash.Add("Six", "Nathan");       hash.Add("Seven", "Tom");       hash.Add("Eight", "Andy");       hash.Add("Nine", "Illeana");       hash.Add("Ten", "Tim");       Console.WriteLine("Hashtable Key and Value pairs...");       ... Read More

To check if Hashtable is read-only, the code is as follows −Example Live Demousing System; using System.Collections; public class Demo {    public static void Main(){       Hashtable hash = new Hashtable();       hash.Add("One", "Katie");       hash.Add("Two", "John");       hash.Add("Three", "Barry");       hash.Add("Four", "");       hash.Add("Five", "Harry");       hash.Add("Six", "F");       hash.Add("Seven", "Tom");       hash.Add("Eight", "Andy");       hash.Add("Nine", "I");       hash.Add("Ten", "Tim");       Console.WriteLine("Hashtable Key and Value pairs...");       foreach(DictionaryEntry entry in hash){     ... Read More

To check if the SortedSet contains a specific element, the code is as follows −Example Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main(){       SortedSet set1 = new SortedSet();       set1.Add("CD");       set1.Add("CD");       set1.Add("CD");       set1.Add("CD");       Console.WriteLine("Elements in SortedSet1...");       foreach (string res in set1){          Console.WriteLine(res);       }       Console.WriteLine("Does the SortedSet1 contains the element DE? = "+set1.Contains("DE"));       SortedSet set2 = new SortedSet();       set2.Add("BC");   ... Read More

To check if a Stack has elements, use the C# Contains() method. Following is the code −Example Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main(){       Stack stack = new Stack();       stack.Push(100);       stack.Push(150);       stack.Push(175);       stack.Push(200);       stack.Push(225);       stack.Push(250);       stack.Push(300);       stack.Push(400);       stack.Push(450);       stack.Push(500);       Console.WriteLine("Elements in the Stack:");       foreach(var val in stack){          Console.WriteLine(val);       ... Read More

To check if a SortedSet object is a proper superset of the specified collection, the code is as follows −Example Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main(){       SortedSet set1 = new SortedSet();       set1.Add(10);       set1.Add(20);       set1.Add(30);       set1.Add(40);       set1.Add(50);       set1.Add(60);       Console.WriteLine("Elements in SortedSet1...");       foreach (int res in set1){          Console.WriteLine(res);       }       SortedSet set2 = new SortedSet();       ... Read More

To check if a SortedSet object is a proper subset of the specified collection, the code is as follows −Example Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main(){       SortedSet set1 = new SortedSet();       set1.Add(20);       set1.Add(40);       set1.Add(60);       set1.Add(80);       set1.Add(100);       set1.Add(120);       set1.Add(140);       Console.WriteLine("Elements in SortedSet1...");       foreach (int res in set1){          Console.WriteLine(res);       }       SortedSet set2 = new SortedSet(); ... Read More

To check if the Hashtable contains a specific value, the code is as follows −Example Live Demousing System; using System.Collections; public class Demo {    public static void Main(){       Hashtable hash = new Hashtable();       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 Key and Value pairs...");       foreach(DictionaryEntry entry in ... Read More