using System;

​

public class Program

{

    private static int search(string phrase, string word)

    {

        var index = phrase.IndexOf(word);

        return index;

    }

​

    public static void Main()

    {

        Console.WriteLine("Hello, user :)");

        var again = "Y";

      //while (again == "Y" || again == "y")

        while (String.Compare(again, "Y", true) == 0 )

        {

            Console.WriteLine("Please enter a phrase, any");

            string phrase = Console.ReadLine();

            Console.WriteLine("Please enter one word or so");

            string word = Console.ReadLine();

            int index = search(phrase, word);

            Console.Write("Thank you , User. Your word or char" + " : ");

            Console.WriteLine(index);

            Console.WriteLine("Thanks for playing. Would y");

            again = Console.ReadLine();

        }

​

        Console.WriteLine("Goodbye :)");

    }

}