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Set two sequences.double[] arr1 = { 10.2, 15.6, 23.3, 30.5, 50.2 }; double[] arr2 = { 15.6, 30.5, 50.2 };To get the difference between both the above arrays, use Except() method.IEnumerable res = arr1.AsQueryable().Except(arr2);The following is the complete code.Example Live Demousing System; using System.Linq; using System.Collections.Generic; class Demo {    static void Main() {       double[] arr1 = { 10.2, 15.6, 23.3, 30.5, 50.2 };       double[] arr2 = { 15.6, 30.5, 50.2 };       Console.WriteLine("Initial List...");       foreach(double ele in arr1) {          Console.WriteLine(ele);       }       IEnumerable res = arr1.AsQueryable().Except(arr2);       Console.WriteLine("New List...");       foreach (double a in res) {          Console.WriteLine(a);       }    } }OutputInitial List... 10.2 15.6 23.3 30.5 50.2 New List... 10.2 23.3

The TryParse() method converts the string representation of one or more enumerated constants to an equivalent enumerated object.Firstly, set an enum.enum Vehicle { Bus = 2, Truck = 4, Car = 10 };Now, let us declare a string array and set some values.string[] VehicleList = { "2", "3", "4", "bus", "Truck", "CAR" };Now parse the values accordingly using Enum TryParse() method.Example Live Demousing System; public class Demo {    enum Vehicle { Bus = 2, Truck = 4, Car = 10 };    public static void Main() {       string[] VehicleList = { "2", "3", "4", "bus", "Truck", "CAR" ... Read More

Bypass elements in an array and return the remaining elements using the SkipWhile() method.The following is our array −int[] marks = { 45, 88, 55, 90, 95, 85 };Now, let’s skip the elements greater than or equal to 60. The condition we have set using Lambda Expression.IEnumerable selMarks = marks.AsQueryable().OrderByDescending(s => s).SkipWhile(s => s >= 60);Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo {    public static void Main() {       int[] marks = { 45, 88, 55, 90, 95, 85 };       // skips elements above 60       IEnumerable selMarks = ... Read More

Skip elements from the end and return the remaining elements using the SkipLast() method.The following is an array.int[] marks = { 45, 88, 50, 90, 95, 85 };Now, let us skip two elements from the end using SkipLast() and Lambda Expressions, but this is done after arranging the elements in descending order.IEnumerable selMarks = marks.AsQueryable().OrderByDescending(s => s).SkipLast(2);Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo {    public static void Main() {       int[] marks = { 45, 88, 50, 90, 95, 85 };       IEnumerable selMarks = marks.AsQueryable().OrderByDescending(s => s).SkipLast(2);       Console.WriteLine("Skipped ... Read More

The numeric ("N") format specifier converts a number to a string of the following form −"-d,ddd,ddd.ddd…"Above,"-" is a negative number symbol if required,"d" is a digit (0-9), "," indicates a group separator,"." is a decimal point symbolExample Live Demousing System; using System.Globalization; class Demo {    static void Main() {       double val1 = -5566.789;       Console.WriteLine(val1.ToString("N", CultureInfo.InvariantCulture));       int val2 = 87987766;       Console.WriteLine(val2.ToString("N3", CultureInfo.InvariantCulture));    } }Output-5,566.79 87,987,766.000

Skip elements and return the remaining elements using the Skip() method.The following is an array.int[] marks = { 80, 55, 79, 99 };Now, let us skip 2 elements using Lambda Expressions, but this is done after arranging the elements in descending order.IEnumerable selMarks = marks.AsQueryable().OrderByDescending(s => s).Skip(2);Exampleusing System; using System.Linq; using System.Collections.Generic; public class Demo {    public static void Main() {       int[] marks = { 80, 55, 79, 99 };       IEnumerable selMarks = marks.AsQueryable().OrderByDescending(s => s).Skip(2);       Console.WriteLine("Skipped the result of 1st two students...");       foreach (int res in selMarks) {          console.WriteLine(res);       }    } }

Let’s say we want to remove whitespace from the following string str1.string str1 = "Brad Pitt";Now, use Regex Replace to replace whitespace with empty. Here, we have used System.Text.RegularExpressions.string str2 = System.Text.RegularExpressions.Regex.Replace(str1, @"\s+", "");Let us see the complete example.Example Live Demousing System; using System.Text.RegularExpressions; namespace Demo {    class Program {       static void Main(string[] args) {          string str1 = "Brad Pitt";          Console.WriteLine(str1);          string str2 = System.Text.RegularExpressions.Regex.Replace(str1, @"\s+", "");          Console.WriteLine(str2);       }    } }OutputBrad Pitt BradPitt

The method returns a single specific element of a sequence. If the element is not present in the sequence, then the default value is returned.We have two string arrays here.string[] str1 = { "one" }; string[] str2 = { };First array is checked for a single element, whereas the second array is empty and checked using SingleorDefault.str2.AsQueryable().SingleOrDefault();The following is an example showing the usage of SingleorDefault() method.Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo {    public static void Main() {       string[] str1 = { "one" };       string[] str2 = { }; ... Read More

The Single() method returns the only element that satisfies a condition. If more than one such element is visible, then an error is thrown.The following is our string array.string[] str = { "jack", "tom", "henry", "time"};Now, use the Single() method to get each element. Then, we have used Lambda Expression to calculate an element whose length is greater than four.str.AsQueryable().Single(name => name.Length > 4);Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo {    public static void Main() {       string[] str = { "jack", "tom", "henry", "time"};       // finding string whose length is ... Read More

Get only a single element of a sequence using the Single() method.Let’s say we have a string array with only one element.string[] str = { "one" };Now, get the element.str.AsQueryable().Single();Here is our code.Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo {    public static void Main() {       string[] str = { "one" };       string res = str.AsQueryable().Single();       Console.WriteLine(res);    } }Outputone