Roli Nested Dicts

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

namespace RoliTheCoder
{
    public class RoliNested
    {
        public static void Main(string[] args)
        {
            Dictionary<int, Dictionary<string, List<string>>> data = ReadData();

            PrintOutput(data);
        }

        private static void PrintOutput(Dictionary<int, Dictionary<string, List<string>>> data)
        {
            foreach (Dictionary<string, List<string>> dict in data.Values.OrderByDescending(ev => ev.Values.Sum(participants => participants.Count)).ThenBy(
                ev => ev.Keys.FirstOrDefault()))
            {
                foreach (KeyValuePair<string, List<string>> ev in dict)
                {
                    Console.WriteLine("{0} - {1}", ev.Key, ev.Value.Count);

                    foreach (string participant in ev.Value.OrderBy(part => part))
                    {
                        Console.WriteLine(participant);
                    }
                }
            }
        }

        private static Dictionary<int, Dictionary<string, List<string>>> ReadData()
        {
            string inputData = Console.ReadLine();

            Dictionary<int, Dictionary<string, List<string>>> data =
                new Dictionary<int, Dictionary<string, List<string>>>();

            while (inputData != "Time for Code")
            {
                string[] commandInfo = inputData.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);

                int id = int.Parse(commandInfo[0]);
                string eventName = commandInfo[1];
                List<string> participants = new List<string>(commandInfo.Skip(2));

                if (eventName[0] != '#')
                {
                    inputData = Console.ReadLine();
                    continue;
                }

                eventName = eventName.Substring(1);

                if (data.ContainsKey(id))
                {
                    if (data[id].ContainsKey(eventName))
                    {
                        data[id][eventName].AddRange(participants);
                        data[id][eventName] = data[id][eventName].Distinct().ToList();
                    }
                }
                else
                {
                    Dictionary<string, List<string>> info = new Dictionary<string, List<string>>
                    {
                        {eventName, participants.Distinct().ToList()}
                    };
                    data.Add(id, info);
                }

                inputData = Console.ReadLine();
            }

            return data;
        }
    }
}