To get a collection of keys in the StringDictionary, 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("U", "Electronics");       strDict1.Add("V", "Toys");     ... Read More

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");     ... 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");     ... 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);       ... 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");   ... 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");     ... 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");     ... 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); ... 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); ... 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);   ... Read More