To remove all entries from 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("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 an array has fixed size or not, try the below code −Example Live Demousing System; public class Demo {    public static void Main(){       string[] products = new string[] { "Electronics", "Accessories", "Clothing", "Toys", "Clothing", "Furniture" };       Console.WriteLine("Products list...");       foreach(string s in products){          Console.WriteLine(s);       }       Console.WriteLine("Is the products Accessories in the array? = {0}",          Array.Exists(products, ele => ele == "Accessories"));       Console.WriteLine("Is the products Stationery in the array? = {0}",       ... Read More

To check if an array contains the elements that match the specific conditions, we can use the StartsWith() method in C# −Example Live Demousing System; public class Demo {    public static void Main(){       string[] products = { "Electronics", "Accessories", "Clothing", "Toys", "Clothing", "Furniture" };       Console.WriteLine("Products list...");       foreach(string s in products){          Console.WriteLine(s);       }       Console.WriteLine("One or more products begin with the letter 'C'? = {0}",       Array.Exists(products, ele => ele.StartsWith("C")));       Console.WriteLine("One or more planets begin with 'D'? = ... Read More

To check if a value is in LinkedList, try the below code −Example Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main(){       LinkedList linkedList = new LinkedList();       linkedList.AddLast(25);       linkedList.AddLast(50);       linkedList.AddLast(100);       linkedList.AddLast(200);       linkedList.AddLast(400);       linkedList.AddLast(500);       linkedList.AddLast(550);       linkedList.AddLast(600);       linkedList.AddLast(800);       linkedList.AddLast(1200);       Console.WriteLine("Count of nodes = " + linkedList.Count);       foreach(int val in linkedList){          Console.WriteLine(val);       } ... Read More

To check if a HashSet and a specified collection share a common element, the C# code is as follows −Example Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main(){       HashSet set1 = new HashSet();       set1.Add(25);       set1.Add(50);       set1.Add(75);       set1.Add(100);       set1.Add(125);       set1.Add(150);       Console.WriteLine("Elements in HashSet1");       foreach(int val in set1){          Console.WriteLine(val);       }       HashSet set2 = new HashSet();       set2.Add(30);   ... Read More

The BitConverter class converts base data types to an array of bytes, and an array of bytes to base data types.Following are the methods −MethodDescriptionDoubleToInt64Bits(Double)Converts the specified double-precision floating-point number to a 64-bit signed integer.GetBytes(Boolean)Returns the specified Boolean value as a byte array.GetBytes(Char)Returns the specified Unicode character value as an array of bytes.GetBytes(Double)Returns the specified double-precision floating-point value as an array of bytes.GetBytes(Int16)Returns the specified 16-bit signed integer value as an array of bytes.GetBytes(Int32)Returns the specified 32-bit signed integer value as an array of bytes.Int64BitsToDouble(Int64)Reinterprets the specified 64-bit signed integer to a double-precision floating-point number.ToBoolean(Byte[], Int32)Returns a Boolean value converted ... Read More

The Join() method in C# is used to concatenate all the elements of a string array, using the specified separator between each element.SyntaxThe syntax is as follows -public static string Join (string separator, string[] val);Above, separator is the separator that gets included in the string. The val parameter is the array containing elements to concatenate.ExampleLet us now see an example - Live Demousing System; public class Demo {    public static void Main(string[] args) {       string[] strArr = {"One", "Two", "Three", "Four" };       Console.WriteLine("String Array...");       foreach(string s in strArr) {     ... Read More

The CopyTo() method in C# is used to copy a specified number of characters from a specified position in this instance to a specified position in an array of Unicode characters.Syntaxpublic void CopyTo (int srcIndex, char[] dest, int desIndex, int count);Above, srcIndex − Index of the first character in this instance to copy.dest − Array of Unicode characters to which characters in this instance are copied.destIndex − The index in destination at which the copy operation begins.Count − Number of characters in this instance to copy to destination.ExampleLet us now see an example - Live Demousing System; public class Demo { ... Read More

The Queue.Contains() method in C# is used to determine whether an element is in the Queue.SyntaxThe syntax is as follows -public virtual bool Contains (object ob);Above, the parameter ob is the Object to locate in the Queue.ExampleLet us now see an example - Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main() {       Queue queue = new Queue();       queue.Enqueue("Gary");       queue.Enqueue("Jack");       queue.Enqueue("Ryan");       queue.Enqueue("Kevin");       queue.Enqueue("Mark");       queue.Enqueue("Jack");       queue.Enqueue("Ryan");       queue.Enqueue("Kevin");       Console.Write("Count ... Read More

The ToCharArray() method in C# is used to copy the characters in this instance to a Unicode character array.SyntaxThe syntax is as follows -public char[] ToCharArray (); public char[] ToCharArray (int begnIndex, int len);Above, begnIndex is the beginning position of a substring in this instance. The len is the length of the substring in this instance.ExampleLet us now see an example - Live Demousing System; public class Demo {    public static void Main(String[] args) {       string str1 = "Notebook";       string str2 = "Ultrabook";       char[] arr1 = str1.ToCharArray();       char[] ... Read More