RemoveNames

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


class RemoveNames
{
    static void Main()
    {
        string input = string.Empty;
        List<string> namesFirst = new List<string>();
        List<string> namesSecond = new List<string>();
        bool check = true;

        NamesInput(input,check,namesFirst,namesSecond);

        RemoveListElements(namesFirst, namesSecond);

        Console.WriteLine("\n"+String.Join(" ", namesFirst));
    }

    static void NamesInput(string input,bool check,List<string> namesFirst,List<string> namesSecond)
    {
        Console.WriteLine("Please input names in first list:\n(Enter \"end\" or \"END\" to finish this operation.)\n");
        while (input != "end" || input != "END")
        {
            input = Console.ReadLine();
            if (input == "end" || input == "END")
            {
                break;
            }

            namesFirst.Add(input);
        }

        Console.WriteLine("Please input names in second list:\n(Enter \"end\" or \"END\" to finish this operation.)\n");
        while (input != "end" || input != "END")
        {
            input = Console.ReadLine();
            if (input == "end" || input == "END")
            {
                break;
            }
            namesSecond.Add(input);
        }
    }
    static void RemoveListElements(List<string> namesFirst, List<string> namesSecond)
    {
        for (int i = 0; i < namesSecond.Count; i++)
        {
            for (int x = 0; x < namesFirst.Count; x++)
            {
                if (namesSecond[i] == namesFirst[x])
                {
                    namesFirst.Remove(namesSecond[i]);
                }
            }
        }
    }
}