using System;

​

using System.Linq;

​

​

namespace ConsoleApp3

{

    public class Program

    {

        public static void Main(string[] args)

        {

            //-------------(link-->--linq101samples)--------------//   //obtain the data source

            int[] numbers = { 4, 20, 30, 40, 3 };                

            string[] words = { "aPPLE", "BlaCKberRy", "cHeRry" };//string for (8)

​

            //-------------------------------------------------//  //creating the query

            int query = numbers.Sum();                                //(1)avg,min,max,count      

             int query1 = numbers.Max();                              //(2)

             int query2 = numbers.Min();                              //(3)

             var num = numbers.Take(3);                               //(4)take first 3 no 

             var firstNumberLessThan6 = numbers.TakeWhile(n => n < 5);//(5)

             var lowNums =                                            //(6)

                        from n in numbers

                        where n < 5

                        select n;

             var numsPlusOne =                                        //(7)

                         from n in numbers

                         select n + 1;

            var upperLowerWord =                                     //(8)

                            from w in words

                            select new { Upper = w.ToUpper(), Lower = w.ToLower() }; 

            //----------------------------------------------------//  //execute

            //Print Above Methods

            Console.WriteLine("sum of no.:" + query);    //(1)

            //........//

            Console.WriteLine("max no:    "+query1);   //(2)

            //........//

            Console.WriteLine("Min No:    "+query2);   //(3)

            //........//

            Console.WriteLine("first 3 numbers:");     //(4)print Take(3)

            foreach (var n in num)

            {

                Console.WriteLine(n);

            }

            //........//

            Console.WriteLine("First numbers less than 5:");//(5)

            foreach (var n in firstNumberLessThan6)

            {

                Console.WriteLine(n);

            }

            //........//

            Console.WriteLine("Numbers<5:");//(6)

            foreach (var x in lowNums)

            {

                Console.WriteLine(x);

            }

            //........//

            Console.WriteLine("Numbers + 1:");//(7)

            foreach (var x in numsPlusOne)

            {

                Console.WriteLine(x);

            }

            //........//

            foreach (var ul in upperLowerWord)                       //(8)

            {

                Console.WriteLine("Uppercase:{0},Lowercase:{1}", ul.Upper, ul.Lower);

            }

            //........//

        }

    }

}