Explain The C# Code

Question

using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

public static void Main()

{

	Console.WriteLine("Hello World");

	var nums = new List

Answer 1

to read this code you need to understand delegate callbacks:

https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/delegates/

and linq:

https://learn.microsoft.com/en-us/dotnet/standard/linq/

and lambda expressions:

https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/operators/lambda-expressions

note: the code:

IEnumerable<NumberHolder> multiplyResult = nums.Select(i => Multiply(i)); IEnumerable<NumberHolder> addOneResult = nums.Select(i => AddOne(i));

can be simplified to:

var multiplyResult = nums.Select(Multiply)
var addOneResult = nums.Select(AddOne);