IEnumerable result = from a in arr

                                         select a;

using System;
using System. Collections;
using System.Collections.Generic;
using System. Linq;
using System. Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Programme2
    {
        static void Main(string[] args)
        {
//create an array of type string
            string[] array = { "Vaishali", "Shalu", "Akshay", "Akki" };
/*IEnumerable will iterate over the collection of data use 
Linq query to select the particular element which starts from s*/
            IEnumerable result = from a in array
            where a.ToLowerInvariant().StartsWith("s")
            select a;
    //foreach loop is used to print the output which is in the result
            foreach (string item in result)
            {
                Console.WriteLine(item);
            }
                Console.ReadLine();
         }
    }
}