Programming Articles - Page 3092 of 3363

Set a list −List myList = new List() {    5,    10,    17,    19,    23,    33 };Let us say you need to find an element that is divisible by 2. For that, use the Find() method −int val = myList.Find(item => item % 2 == 0);Here is the complete code −Example Live Demousing System; using System.Collections.Generic; using System.Linq; class Demo {    static void Main() {       List myList = new List() {          5,          10,          17,          19,          23,          33       };       Console.WriteLine("List: ");       foreach(int i in myList) {          Console.WriteLine(i);       }       int val = myList.Find(item => item % 2 == 0);       Console.WriteLine("Element that divides by zero: "+val);    } }OutputList: 5 10 17 19 23 33 Element that divides by zero: 10

Use the Skip() method in C# to skip number of elements in an array.Let’s say the following is our array −int[] arr = { 10, 20, 30, 40, 50 };To skip the first two elements, use the Skip() method and add argument as 2 −arr.Skip(2);Let us see an example −Example Live Demousing System.IO; using System; using System.Linq; public class Demo {    public static void Main() {       int[] arr = { 10, 20, 30, 40, 50 };       Console.WriteLine("Initial Array...");       foreach (var res in arr) {          Console.WriteLine(res);     ... Read More

The All() extension method is part of the System.Linq namepspace. Using this method, you can check whether all the elements match a certain condition or not.Set an array −int[] arr = { 6, 7, 15, 40, 55 };The following is an example. It checks whether all the elements in the array is greater than and equal to 2 or not −arr.All(element => element > = 2);Here is the complete code −Example Live Demousing System; using System.Linq; class Program {    static void Main() {       int[] arr = { 6, 7, 15, 40, 55 };       bool res = arr.All(element => element >= 2);       Console.WriteLine(res);    } }OutputTrue

Use the Aggregate method in C# to perform mathematical operations such as Sum, Min, Max, Average, etc.Let us see an example to multiply array elements using Aggregate method.Here is our array −int[] arr = { 10, 15, 20 };Now, use Aggregate() method −arr.Aggregate((x, y) => x * y);Here is the complete code −Example Live Demousing System; using System.Linq; using System.IO; public class Demo {    public static void Main() {       int[] arr = { 10, 15, 20 };       // Multiplication       int res = arr.Aggregate((x, y) => x * y);       Console.WriteLine(res);    } }Output3000

With the TakeWhile() method, you can get methods by setting a condition base on Predicate.Firstly, declare and initialize an array −int[] arr = { 25, 40, 65, 70};Now, use the TakeWhile() method and predicate to get all the elements that are less than 30.var val = arr.TakeWhile(ele => ele < 30);Let us see the same example, wherein we have displayed the values less than 30 using Predicate −Example Live Demousing System; using System.Linq; using System.IO; public class Demo {    public static void Main() {       int[] arr = { 25, 40, 65, 70};       var val = arr.TakeWhile(ele => ele < 30);       foreach (int res in val) {          Console.WriteLine(res);       }    } }Output25

Firstly, use GetDrives to get the name of all the drives −var drv = DriveInfo.GetDrives();Loop through to get the name of all the drives on the system −foreach (DriveInfo dInfo in drv) {    Console.WriteLine(dInfo.Name); }Let us see the complete code −Example Live Demousing System; using System.Linq; using System.IO; public class Demo {    public static void Main() {       var drv = DriveInfo.GetDrives();       foreach (DriveInfo dInfo in drv) {          Console.WriteLine(dInfo.Name);       }    } }Output/etc/resolv.conf /etc/hostname /etc/hosts /run/secrets /home/cg/rootNote: The result will vary on different Operating Systems. The above ... Read More

Use the DriveFormat property to get the drive format in C#.Set the drive for which you want to display the format −DriveInfo dInfo = new DriveInfo("C");Now, use DriveFormat to get the drive format −dInfo.DriveFormatThe drive formats for a windows system can be NTFS or FAT32.Here is the complete code −Exampleusing System; using System.Linq; using System.IO; public class Demo {    public static void Main() {       DriveInfo dInfo = new DriveInfo("C");       Console.WriteLine("Drive Format = "+dInfo.DriveFormat);    } }OutputThe following is the output −Drive Format = NTFS

Use the RootDirectory property to get the name of the root directory.Firstly, use DriveInfo to set the drive for which you want the root directory −DriveInfo dInfo = new DriveInfo("C");Now, the RootDirectory gives you the result −dInfo.RootDirectoryExampleHere is the complete code −using System; using System.Linq; using System.IO; public class Demo {    public static void Main() {       DriveInfo dInfo = new DriveInfo("C");       Console.WriteLine("Root Directory: "+dInfo.RootDirectory);    } }OutputThe following is the output −C:\

Set the drive for which you want to display the name −DriveInfo info = new DriveInfo("C");Now, to get the drive name, use the Name property −info.NameHere is the complete code with output −Exampleusing System; using System.Linq; using System.IO; public class Demo {    public static void Main() {       DriveInfo info = new DriveInfo("C");       Console.WriteLine(“Drive: “+info.Name);    } }OutputThe following is the output −D:/

To get the free space in a drive, use the AvailableFreeSpace and TotalFreeSpace properties in C#.Firstly, set the name of the drive using DriveInfo −DriveInfo dInfo = new DriveInfo("D");Let’s say, you need to find the available space for D drive −Exampleusing System; using System.Linq; using System.IO; public class Demo {    public static void Main() {       DriveInfo dInfo = new DriveInfo("D");       // Get free space       Console.WriteLine(dInfo.AvailableFreeSpace);       // get total free space       Console.WriteLine(dInfo.TotalFreeSpace);    } }OutputThe following is the output showing the free space available in D drive−722243567912 722243567912