Set an array and arrange it in descending order using OrderByDescending.int[] prod = { 290, 340, 129, 540, 456, 898, 765, 789, 345};Now, use the Take() method to return specified number of elements from the beginning.Enumerable units = prod.AsQueryable().OrderByDescending(s => s).Take(2);Let us see the complete code.Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo {    public static void Main() {       int[] prod = { 290, 340, 129, 540, 456, 898, 765, 789, 345};       // Volume of top two products       IEnumerable units = prod.AsQueryable().OrderByDescending(s => s).Take(2);       foreach (int res in units) {          Console.WriteLine(res);       }    } }Output898 789

The Format method converts value of a specified enumerated type to its equivalent string representation. Here you can also set the format i.e. d for Decimal, x for HexaDecimal, etc.We have the following enumeration.enum Stock { PenDrive, Keyboard, Speakers };The default value gets assigned (initialize).PenDrive = 0 Keyboard = 1 Speakers = 2Now, let’s say you want the value of “Keyboard” name.Stock st = Stock.Keyboard;For that, try the following and get the constant value for Keyboard name.Enum.Format(typeof(Stock), st, "d")The following is the entire example.Example Live Demousing System; class Demo {    enum Stock { PenDrive, Keyboard, Speakers };    static void ... Read More

Convert a specified value to a 32-bit unsigned integer using the Convert.ToUInt32 method.The following is our string.string str = "210";Now, let us convert it to a 32-bit unsigned integer.uint res; res = Convert.ToUInt32(str);Example Live Demousing System; public class Demo {    public static void Main() {       string str = "210";       uint res;       res = Convert.ToUInt32(str);       Console.WriteLine("Converted string '{0}' to {1}", str, res);    } }OutputConverted string '210' to 210

To find the equality between enums, use the Equals() method.Let’s say we have the following Enum.enum Products { HardDrive, PenDrive, Keyboard};Create two Products objects and assign the same values.Products prod1 = Products.HardDrive; Products prod2 = Products.HardDrive;Now check for equality using Equals() method. It would be True since both have the same underlying value.Example Live Demousing System; class Program {    enum Products {HardDrive, PenDrive, Keyboard};    enum ProductsNew { Mouse, HeadPhone, Speakers};    static void Main() {       Products prod1 = Products.HardDrive;       Products prod2 = Products.HardDrive;       ProductsNew newProd1 = ProductsNew.HeadPhone;       ... Read More

Compare two enums using the CompareTo() method in C#.The method returns any of the following value −Less than zero: Value of source is less than value of targetZero: Value of source is equal to the value of targetMore than zero: Value of source is more than value of targetExample Live Demousing System; class Program {    enum Products { HardDrive = 0, PenDrive = 4, Keyboard = 8 };    static void Main() {       Products prod1 = Products.HardDrive;       Products prod2 = Products.PenDrive;       Products prod3 = Products.Keyboard;       Console.WriteLine("Stock for {0} ... Read More

Get the last element from a sequence using the Linq Last() method.The following is our array.int[] val = { 10, 20, 30, 40 };Now, get the last element.val.AsQueryable().Last();Example Live Demousing System; using System.Collections.Generic; using System.Linq; class Demo {    static void Main() {       int[] val = { 10, 20, 30, 40 };       // getting last element       int last_num = val.AsQueryable().Last();       Console.WriteLine("Last element: "+last_num);    } }OutputLast element: 40

Use the Convert.ToUInt64() method to convert a specified value to a 64-bit unsigned integer.The following is our char.char ch = 'a';Now, let’s convert it to a 64-bit unsigned integer.ulong res; res = Convert.ToUInt64(ch);Here is the complete example.Example Live Demousing System; public class Demo {    public static void Main() {       char ch = 'a';       ulong res;       res = Convert.ToUInt64(ch);       Console.WriteLine("Converted char value '{0}' to {1}", ch, res);    } }OutputConverted char value 'a' to 97

The Convert.ToByte method is used to convert a specified value to an 8-bit unsigned integer.Let’s say we have a char variable.Char charVal = ‘a’;Now, convert it to an 8-bit unsigned integer.byte byteVal = Convert.ToByte(charVal);Let us see another example now.Example Live Demousing System; public class Demo {    public static void Main() {       char[] charVal = { 'p', 'q', 'r', 's' };       foreach (char c in charVal) {          byte byteVal = Convert.ToByte(c);          Console.WriteLine("{0} is converted to = {1}", c, byteVal);       }    } }Outputp is converted to = 112 q is converted to = 113 r is converted to = 114 s is converted to = 115

The Convert.ToBoolean method is used to convert a specified value to an equivalent Boolean value.The following is our double type.double doubleNum = 329.34;To convert it to Boolean, use the Convert.ToBoolean() method.bool boolNum; boolNum = System.Convert.ToBoolean(doubleNum);Let us see another example.Example Live Demousing System; public class Demo {    public static void Main() {       double doubleNum = 3.4;       bool boolNum;       // Double to bool       boolNum = System.Convert.ToBoolean(doubleNum);       System.Console.WriteLine("{0} as a Boolean = {1}.", doubleNum, boolNum);    } }Output3.4 as a Boolean = True.

The ChangeType() method returns an object of the specified type and whose value is equivalent to the specified object.Let’s say we have a double type.double val = -3.456Now, use the ChangeType method to change the type to integer.num = (int)Convert.ChangeType(val, TypeCode.Int32);Let us see the complete example.Example Live Demousing System; public class Demo {    public static void Main() {       double val = -3.456;       int num = (int)Convert.ChangeType(val, TypeCode.Int32);       Console.WriteLine("{0} converted to an Int32: {1}", val, num);    } }Output-3.456 converted to an Int32: -3