Use the Linq LongCount method to get the count of elements.The following is our string array −string[] emp = { "Jack", "Mark"};Now, use the LongCount() method.emp.AsQueryable().LongCount();Here is the complete code.Example Live Demousing System; using System.Collections.Generic; using System.Linq; class Demo {    static void Main() {       string[] emp = ... Read More

Set an array.int[] arr = { 40, 42, 12, 83, 75, 40, 95 };Use the Where clause and predicate to get elements above 50.IEnumerable myQuery = arr.AsQueryable() .Where((a, index) => a >= 50);Let us see the complete code −Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo { ... Read More

Convert a specified value to a 16-bit signed integer using the Convert.ToInt16 method in C#.We have a double variable with a value initialized to it.double doubleNum = 3.456;Now, let us convert it to Int16 i.e. short.short shortNum; shortNum = Convert.ToInt16(doubleNum);Here is the complete example −Example Live Demousing System; public class Demo ... Read More

To represent Int64 as a Binary string in C#, use the ToString() method and set the base as the ToString() method’s second parameter i.e. 2 for Binary.Int64 represents a 64-bit signed integer.Firstly, set an Int64 variable.long val = 753458;Now, convert it to binary string by including 2 as the second ... Read More

Convert a string representation of number to an integer, using the int.TryParse and intParse method in C#.If the string cannot be converted, then the int.TryParse method returns false i.e. a Boolean value, whereas int.Parse returns an exception.Let us see an example of int.Parse method −Example Live Demousing System.IO; using System; class ... Read More

It lets you specify a block of code that you can expand or collapse when using the outlining feature of the Visual Studio Code Editor. It should be terminated with #endregion.Let us see how to define a region using #region.#region NewClass definition public class NewClass {    static void Main() ... Read More

Set the path name in a string −string myPath = "D:ew\quiz.txt";Now, use the GetFileName() method to get the name of the file −Path.GetFileName(myPath)The following is the complete code −Example Live Demousing System; using System.IO; namespace Demo {    class Program {       static void Main(string[] args) {     ... Read More

To get all the disk drives on a system, use the GetLogicalDrives() method in C# −Environment.GetLogicalDrives()Use it with Join method to get the comma-separated list of logical drives −string.Join(", ", Environment.GetLogicalDrives())Example Live Demousing System; using System.IO; namespace Demo {    class Program {       static void Main(string[] args) { ... Read More

Use the Regex.Replace method to remove the end part of a string in C#.The following is the string −string s1 = "Demo Text!";Now, let us say you need to remove the exclamation mark (!) from the string. For that just set it to empty using replace −System.Text.RegularExpressions.Regex.Replace(s1, "!", "");Here is ... Read More

Firstly, set a string −string str = "Science and Mathematics";Now use the Split() method to split wherever the spaces occur −str.Split(' ')The following is the complete code −Example Live Demousing System; using System.Linq; using System.IO; class Program {    static void Main() {       string str = "Science and ... Read More