using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string[] mainList = {"Warp", 

                            "Orient",

                            "Target",

                            "Alert", 

                            "Hail",

                            "Shields",

                            "Transport",

                            "Fire",

                            "Retreat"};

        string[] randomTerms = { "Alpha", "Hail", "Fire", "fire", "Swarm", "Transportation", "War" };

        foreach( var term in randomTerms ) {

            int ix = Array.IndexOf(mainList, term);

            bool isContains = mainList.Contains( term, StringComparer.CurrentCultureIgnoreCase ); // System.Linq

            Console.WriteLine( "indexOf {0} = {1}, isContains = {2}", term, ix, isContains.ToString());

        }

    }

}