ForceBook with List<string>

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

namespace SoftUniExamResults
{
    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string, List<string>> map =
                new Dictionary<string, List<string>>();

            while (true)
            {
                string input = Console.ReadLine();

                if (input=="Lumpawaroo")
                {
                    break;
                }
                string[] checkedForceUsers = input.Split(new string[] { " | ", " -> " }, StringSplitOptions.RemoveEmptyEntries);

                if (input.Contains("|"))
                {
                    string forceSide = checkedForceUsers[0];
                    string forceUser = checkedForceUsers[1];

                    if (!map.ContainsKey(forceSide))
                    {
                        map.Add(forceSide, new List<string>());
                    }

                    if (!map.Values.Any(d => d.Contains(forceUser)))
                    {
                        map[forceSide].Add(forceUser);
                    }
                }
                else
                {
                    string forceUser = checkedForceUsers[0];
                    string forceSide = checkedForceUsers[1];

                    foreach (var user in map)
                    {
                        user.Value.RemoveAll(x=>x == forceUser);
                    }

                    if (!map.ContainsKey(forceSide))
                    {
                        map.Add(forceSide, new List<string>());
                    }

                    if (!map.Values.Any(d => d.Contains(forceUser)))
                    {
                        map[forceSide].Add(forceUser);
                        Console.WriteLine($"{forceUser} joins the {forceSide} side!");
                    }
                }
            }

            foreach (var item in map
                .Where(x=>x.Value.Count > 0)
                .OrderByDescending(x=>x.Value.Count)
                .ThenBy(x=>x.Key))
            {
                Console.WriteLine($"Side: {item.Key}, Members: {item.Value.Count}");

                foreach (var user in item.Value.OrderBy(x=>x))
                {
                    Console.WriteLine($"! {user}");
                }
            }
        }
    }
}