using System;

public class Program

{

    public static void Main()

    {

        string[] ogcontent = {"f", "red", "frs", "xyr", "frefff", "xdd", "to"};

        string lineData = "";

        int lineIndex = 0;

        for (int i = 0; i < ogcontent.Length; i++)

        {

            string line = ogcontent[i];

            var index = i;

​

            if (line.Contains("x"))

            {

                lineData = line;

                lineIndex = index; 

                Console.WriteLine("index = {0}", i);

                Console.WriteLine("value = {0}", line);

                break;

            }

        }

    }

​

}