Company Users

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

namespace CompanyUsers
{
    class Program
    {
        static void Main(string[] args)
        {
            string input;
            Dictionary<string, List<string>> companies = new Dictionary<string, List<string>>();
            while((input = Console.ReadLine()) != "End")
            {
                string[] separated = input.Split(" -> ");
                string compName = separated[0];
                string id = separated[1];
                if (companies.ContainsKey(compName))
                {
                    companies[compName].Add(id);
                }
                else
                {
                    companies.Add(compName, new List<string>());
                    companies[compName].Add(id);
                }
            }

            var ordered = companies.OrderBy(k => k.Key);
            foreach(var item in ordered)
            {
                Console.WriteLine(item.Key);
                foreach(var list in item.Value)
                {
                    Console.WriteLine("--" + list);
                }
            }
        }
    }
}