using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var notSearchable = "0";

        var searchable = "1";

        var hiddenTag = "hidden";

        var tags = new List<string>() {"foo", "hidden", "bar"} ;

        var isSearchable = (tags.Select(s => s.ToLower()).Contains(hiddenTag.ToLower())) ? notSearchable : searchable;

        Console.WriteLine(isSearchable);

    }

}