Use the TakeLast() method to return elements from the end of an array.Let us first declare and initialize an array.int[] prod = { 110, 290, 340, 540, 456, 698, 765, 789};Now, let’s get the last three elements.IEnumerable units = prod.AsQueryable().TakeLast(3);Let us see the complete code.Example Live Demousing System; using System.Linq; using ... Read More

Use the AsEnumerable() method to cast a type to its IEnumerable equivalent. It is an extension method.For our example, we have set an array.int[] myArr = new int[10]; myArr[0] = 1; myArr[1] = 2; myArr[2] = 3; myArr[3] = 4; myArr[4] = 5;Now, we have used the AsEnumerable() method to ... Read More

This method returns true if the entered string has only whitespace characters or is null.Let’s say you are checking for whitespace character.bool val1 = string.IsNullOrWhiteSpace(“ “);The above returns True, since the string is a whitespace character. In the same way, check it for null using the IsNullOrWhiteSpace() method.Here is the ... Read More

Filter a collection on the basis of each of its elements type.Let’s say you have the following list with integer and string elements −list.Add("Katie"); list.Add(100); list.Add(200);To filter collection and get only elements with string type.var myStr = from a in list.OfType() select a;Work the same for integer type.var myInt = ... Read More

The Month standard format specifier represents a custom date and time format string.The format string is defined by the current DateTimeFormatInfo.MonthDayPattern property.The custom format string −MMMM ddExample Live Demousing System; using System.Globalization; class Demo {    static void Main() {       DateTime date = new DateTime(2018, 6, 11, 9, ... Read More

The f is a lowercase suffix set while declaring a float. It tells the compiler that the literal is of a specific type.Example Live Demousing System.IO; using System; public class Program {    public static void Main() {       float val = 30.22f;       Console.WriteLine(val);    } ... Read More

Firstly, set a tuplevar tuple = Tuple.Create(100, 200, 300);Now, pass the tuple as a method parameter −Show(tuple);Here’s our method.static void Show(Tuple tuple)Now call the tuple values one by one as shown below −Example Live Demousing System; public class Program {    public static void Main() {       var tuple ... Read More

Use the Convert.ToUInt16 method to convert a specified value to a 16-bit unsigned integer.Here is our string −string str = "1129";Now let us convert it to 16-bit unsigned integer.ushort res; res = Convert.ToUInt16(str);The following is the complete example −Example Live Demousing System; public class Demo {    public static void Main() ... Read More

The All Method checks for all the values in a collection and returns a Boolean. Even if one of the element do not satisfy the set condition, the All() method returns False.Let us see an example −int[] arr = {10, 15, 20};Now, using All() method, we will check whether each ... Read More

Firstly, set a string.StringBuilder str = new StringBuilder();Use Random.Random random = new Random((int)DateTime.Now.Ticks);Now loop through a number which is the length of the random string you want.for (int i = 0; i < 4; i++) {    c = Convert.ToChar(Convert.ToInt32(Math.Floor(26 * random.NextDouble() + 65)));    str.Append(c); }On every iteration above, ... Read More