Teamwork

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

namespace Teamwork_project
{
    class Team
    {
        public string Name { get; set; }
        public string CreatorTeamName { get; set; }
        public List<string> users { get; set; }
    }

    class Program
    {
        static void Main()
        {
            int n = int.Parse(Console.ReadLine());
            List<Team> teamList = new List<Team>();
            List<string> messages = new List<string>();

            string[] inputArr;
            string nameUser = null;
            string input = null;
            string nameTeam = null;
            string messageStr = null;

            for (int i = 0; i < n; i++)
            {
                input = Console.ReadLine();
                inputArr = input.Trim().Split('-');
                nameUser = inputArr[0];
                nameTeam = inputArr[1];
                if ((!teamList.Any(x => x.Name == nameTeam)) &&
                    (!teamList.Any(x => x.CreatorTeamName == nameUser)))
                {
                    Team team = new Team();
                    team.users = new List<string>();
                    team.CreatorTeamName = nameUser;
                    team.Name = nameTeam;
                    teamList.Add(team);
                    messageStr = "Team " + nameTeam + " has been created by " + nameUser + "!";
                    messages.Add(messageStr);
                }
                else
                {
                    if (teamList.Any(x => x.Name == nameTeam))
                    {
                        messageStr = "Team " + nameTeam + " was already created!";
                        messages.Add(messageStr);
                    }
                    if (teamList.Any(x => x.CreatorTeamName == nameUser))
                    {
                        messageStr = nameUser + " cannot create another team!";
                        messages.Add(messageStr);
                    }
                }
            }

            do
            {
                input = Console.ReadLine();
                if (input== "end of assignment")
                {
                    break;
                }
                inputArr = input
                    .Trim()
                    .Split(new char[] { '-', '>' }, StringSplitOptions.RemoveEmptyEntries);
                nameUser = inputArr[0];
                nameTeam = inputArr[1];
                if (!teamList.Any(x => x.Name == nameTeam))
                {
                    messageStr = "Team " + nameTeam + " does not exist!";
                    messages.Add(messageStr);
                }
                else
                {
                    if ((teamList.Any(x => x.users.Contains(nameUser))) ||
                        (teamList.Any(x => x.CreatorTeamName == nameUser)))
                    {
                        messageStr = "Member " + nameUser + " cannot join team " + nameTeam + "!";
                        messages.Add(messageStr);
                    }
                    else
                    {
                        int index = teamList.FindIndex(x => x.Name == nameTeam);
                        teamList[index].users.Add(nameUser);
                    }
                }


            } while (input != "end of assignment");

            foreach (var message in messages)
            {
                Console.WriteLine(message);
            }
            var sortTeamList = teamList.OrderByDescending(x => x.users.Count).OrderBy(x => x.Name);
            List<string> disbandList = new List<string>();
            foreach (var team in sortTeamList)
            {
                if (team.users.Count > 0)
                {
                    Console.WriteLine(team.Name);
                    Console.WriteLine("- {0}", team.CreatorTeamName);
                    var sortUsersName = team.users.OrderBy(x => x).ToList();
                    for (int i = 0; i < sortUsersName.Count; i++)
                    {
                        Console.WriteLine("-- {0}",sortUsersName[i]);
                    }
                }
                else
                {
                    disbandList.Add(team.Name);
                }
            }
            Console.WriteLine("Teams to disband:");
            if (disbandList.Count > 0)
            {
                var sortDisbandList = disbandList.OrderBy(x => x);
                foreach (var sdl in sortDisbandList)
                {
                    Console.WriteLine(sdl);
                }
            }

        }
    }
}