using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        List<string> colorList = new List<string> { "red", "red", "yellow", "blue", "blue", "orange", "green", "red" };

        var hasDuplicate = HasDuplicateName(colorList, "red");

        Console.WriteLine(hasDuplicate);

    }

    private static bool HasDuplicateName(IEnumerable<string> items, string name)

    {

        if (items.Any() && !string.IsNullOrEmpty(name))

        {

            return items.Where(a => a == name.Trim().ToLowerInvariant()).Count() > 1 ? true: false;

        }

        return false;

    }

}