using System;

using System.Collections.Generic; 

using System.Linq;

public class Program

{

    public delegate bool IsOdd(int number);

    public delegate bool IsEven(int number);

    public delegate bool Anonymous(int number);  

​

    public static void Main()

    {

        List<int> numbers = new List<int>() {36, 71, 12, 15, 29, 18, 27, 17, 9, 34}; 

        //1.    Find odd - Lambda Expression – without curly brackets

        IsOdd isOddDelegate = x => (x % 2) != 0;

        List<int> oddNumbers = numbers.Where(x => isOddDelegate(x)).ToList();

        Console.WriteLine("Odd numbers :");

        oddNumbers.ForEach(Console.WriteLine);

        Console.WriteLine(); 

​

        //2.    Find Even - Lambda Expression – with curly brackets

        IsEven isEvenDelegate = x => {

            return (x%2 == 0) ;

        };

        List<int> evenNumbers = numbers.Where(x => {

            if(isEvenDelegate(x))

                return true;

            else

                return false;

        }).ToList();

        Console.WriteLine("Even numbers :");

        evenNumbers.ForEach(Console.WriteLine);

        Console.WriteLine(); 

        //3.    Find Prime – Anonymous Method

        Anonymous isPrime = delegate(int number){

         int divisors = 0;

         for (int i = 1; i <= number; i++) {

            if (number % i == 0) {

               divisors++;

            }

         }

         if (divisors == 2) {

            return true;

         } else {

            return false;

         }

        };

        List<int> primeNumbers = numbers.Where(x => isPrime(x)).ToList();

        Console.WriteLine("Prime numbers :");

        primeNumbers.ForEach(Console.WriteLine);

        Console.WriteLine();

    }

}