Filter collections using Where clause in C#. A single query expression may have multiple where clauses.Firstly, set a collection −IList employee = new List() {    new Employee() { EmpID = 1, EmpName = "Tom", EmpMarks = 90, Rank = 8} ,    new Employee() { EmpID = 2, EmpName ... Read More

Firstly, create a tuple as shown below that calls a method.var tuple = Show();The above statement calls the following method −static Tuple Show()Under the method, return the tuple as shown below −Example Live Demousing System; public class Demo {    public static void Main() {       var tuple = ... Read More

This round-trip ("R") format specifier is supported for the Single, Double, and BigInteger types.It ensures that a numeric value converted to a string is parsed back into the same numeric value.Let us see an example −Firstly, we have a double variable.double doubleVal = 0.91234582637;Now, use the ToString() method: and set ... Read More

If a File you are trying to find does not exist, then FileNotFoundException occurs.Here, we are try to find a file that does not exist using StreamReader() method.reader = new StreamReader("new.txt"))To read it we have used the following method −reader.ReadToEnd();Let us see the complete code.Exampleusing System.IO; using System; class Program ... Read More

Firstly, set a list and add elements.List myList = new List(); myList.Add("Jennings"); myList.Add("James"); myList.Add("Chris");Let’s say you need to delete the element “James” now. For that, use the Remove() method.myList.Remove("James");Here is the complete code.Example Live Demousing System.Collections.Generic; using System; class Program {    static void Main() {       List myList ... Read More

Set an array.int[] array = new int[] { 50, 100, 150, 200, 250, 300, 350, 400 };Now, if you will print this array using a loop and new line, then the arrays will be visible vertically.To work it horizontally, use the Join() method and set spaces to separate array elements.string.Join(" ... Read More

Let’s say the following is the string −StringBuilder str = new StringBuilder("Patience is key!");To remove whitespace, you can use the replace method.str.Replace(" ", "");Let us see the complete code.Example Live Demousing System; using System.Text; class Demo {    static void Main() {       // Initial String       ... Read More

To represent Int632as 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.Int32 represents a 32-bit signed integer.Firstly, set an Int64 variable −int val = 30;Now, convert it to a binary string by including 2 as the ... Read More

Set two arrays.var val = new [] { 20, 40, 60}; var str = new [] { "ele1", "ele2", "ele3"};Use the zip() method to process the two arrays in parallel.var res = val.Zip(str, (n, w) => new { Number = n, Word = w });The above fetches both the arrays ... Read More

Use Hashset to remove duplicate characters.Here is the string −string myStr = "kkllmmnnoo";Now, use HashSet to map the string to char. This will remove the duplicate characters from a string.var unique = new HashSet(myStr);Let us see the complete example −Example Live Demousing System; using System.Linq; using System.Collections.Generic; namespace Demo { ... Read More