Set a string with duplicate words.string str = "One Two Three One";Above, you can see the word “One” comes twice.To remove dulicate words, you can try to run the following code in C# −Example Live Demousing System; using System.Linq; public class Program {    public static void Main() {       string str = "One Two Three One";       string[] arr = str.Split(' ');       Console.WriteLine(str);       var a =       from k in arr       orderby k       select k;       Console.WriteLine("After removing duplicate words..."); ... Read More

Firstly, declare a HashSet and add elements −var names = new HashSet(); names.Add("Tim"); names.Add("John"); names.Add("Tom"); names.Add("Kevin");To remove an element, use RemoveWhere.names.RemoveWhere(x => x == "John");Let us see the complete example −Exampleusing System; using System.Collections.Generic; public class Program {    public static void Main() {       var names = new HashSet < string > ();       names.Add("Tim");       names.Add("John");       names.Add("Tom");       names.Add("Kevin");       Console.WriteLine("Initial Set...");       foreach(var val in names) {          Console.WriteLine(val);       }       names.RemoveWhere(x => x ... Read More

Set the list.List < int > list = new List < int > (); list.Add(99); list.Add(49); list.Add(32);To get unique elements.List myList = list.Distinct().ToList();Here is the complete example to display unique values from a list.Example Live Demousing System; using System.Collections.Generic; using System.Linq; public class Demo {    public static void Main() {       List < int > list = new List < int > ();       list.Add(55);       list.Add(45);       list.Add(55);       list.Add(65);       list.Add(73);       list.Add(24);       list.Add(65);       Console.WriteLine("Initial List..."); ... Read More

Let’s say you need to find the elements in the following list to be greater than 80.int[] arr = new int[] {55, 100, 87, 45};For that, loop until the array length. Here, res = 80 i.e. the given element.for (int i = 0; i < arr.Length; i++) {    if(arr[i] res) {                Console.WriteLine(arr[i]);             }          }       }    } }

Declare a list and add elements.List list = new List(); list.Add(50); list.Add(90); list.Add(50); list.Add(100);Now, use Distinct() method to get the unique elements only.List myList = list.Distinct().ToList();The following is the complete code to remove duplicate elements from a List −Example Live Demousing System; using System.Collections.Generic; using System.Linq; public class Demo {    public static void Main() {       List < int > list = new List < int > ();       list.Add(50);       list.Add(90);       list.Add(50);       list.Add(100);       Console.WriteLine("Initial List...");       foreach(int a in list) ... Read More

Set the first list.int[] arr1 = {    65,    57,    63,    98 };Now, set the second list.int[] arr2 = {    43,    65,    33,    57 };Let us now see the complete code to check if two lists have common elements using == and < operators.Example Live Demousing System; using System.Collections.Generic; using System.Linq; public class Program {    public static void Main() {       int[] arr1 = {          65,          57,          63,          98       }; ... Read More

Firstly, declare and initialize a jagged array.int[][] arr = new int[][] { new int[] {    0,    0 }, new int[] {    1,    2 }, new int[] {    2,    4 }, new int[] {    3,    6 }, new int[] {    4,    8 } };Now use the length property to get the length.arr.LengthThe following is the complete code −Example Live Demousing System; public class Program {    public static void Main() {       int[][] arr = new int[][]{new int[]{0,0},new int[]{1,2}, new int[]{2,4},new int[]{ 3, 6 }, new       int[]{ 4, 8 } };       // Length       Console.WriteLine("Length:"+arr.Length);       Console.WriteLine("Upper Bound: {0}",arr.GetUpperBound(0).ToString());       Console.WriteLine("Lower Bound: {0}",arr.GetLowerBound(0).ToString());       Console.WriteLine("Dimensions of Array : " + arr.Rank);    } }OutputLength:5 Upper Bound: 4 Lower Bound: 0 Dimensions of Array : 1

To copy or clone a C# list, firstly set a list.List < string > myList = new List < string > (); myList.Add("One"); myList.Add("Two");Now declare a string array and use the CopyTo() method to copy.string[] arr = new string[10]; myList.CopyTo(arr);Let us see the complete code to copy a list into a one-dimensional array.Exampleusing System; using System.Collections.Generic; using System.Linq; public class Demo {    public static void Main() {       List < string > myList = new List < string > ();       myList.Add("One");       myList.Add("Two");       myList.Add("Three");       myList.Add("Four"); ... Read More

For validity of a password, you need to recall the concept when your create a password to signup to a website.While creating a password, you may have seen the validation requirements on a website like a password should be strong and have −Min 8 char and max 14 charOne upper caseOne special charOne lower caseNo white spaceLet us see how to check the conditions one by one.Min 8 char and max 14 charif (passwd.Length < 8 || passwd.Length > 14) return false;One upper caseif (!passwd.Any(char.IsUpper)) return false;Atleast one lower caseif (!passwd.Any(char.IsLower)) return false;No white spaceif (passwd.Contains(" ")) return false;Check for ... Read More

Using Synchronization, you can synchronize access to resources in multithreaded applications.A mutex can be used to synchronize threads across processes Use it to prevent the simultaneous execution of a block of code by more than one thread at a time.C# lock statement is used to ensure that a block of code runs without interruption by other threads. A Mutual-exclusion lock is obtained for a given object for the duration of the code block.Thread pool in C# is a collection of threads. It is used to perform tasks in the background. When a thread completes a task, it is sent to ... Read More