list in c#

 using System;

using System.Collections.Generic;

class Program {

    static void Main() {

        // Write your C# code here

        Console.WriteLine("Hello, World!");

        List<string>ShoppingList=new List<string>{

            "COFFEE","MILK","TEA"

        };

     

    Console.WriteLine(" enter string to search ");

      string search=Console.ReadLine();

    if(FindInList(search,ShoppingList,out int index)){

        Console.WriteLine($"Found {search} at {index}");

    }else{

        Console.WriteLine("not found");

    }

   

    }

     static bool FindInList(string item, List<string> list, out int index) {

        for (int i = 0; i < list.Count; i++) {

            if (string.Equals(list[i], item, StringComparison.OrdinalIgnoreCase)) {

                index = i;

                return true;

            }

        }

        index = -1;

        return false;

    }

}