User Logs

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

namespace User_Logs
{
    class Program
    {
        static void Main()
        {
            SortedDictionary<string, List<string>> sd = new SortedDictionary<string, List<string>>();
            string input = null;
            do
            {
                input = Console.ReadLine();

                if (input=="end")
                {
                    break;
                }

                List<string> inputList = input.Trim().Split(new char[] {'='},StringSplitOptions.RemoveEmptyEntries).ToList();
                List<string> inputList2 = inputList[1].Split(' ').ToList();
                string valueUser = inputList[inputList.Count - 1];
                string valueIP = inputList2[0];

                if (sd.ContainsKey(valueUser))
                {
                    sd[valueUser].Add(valueIP);
                }
                else
                {
                    sd.Add(valueUser, new List<string>() { valueIP });
                }

            } while (input!="end");

            Dictionary<string, int> ipCounter = new Dictionary<string, int>();
            int count = 1;

            foreach (KeyValuePair<string,List<string>> kvp in sd)
            {
                for (int i = 0; i < kvp.Value.Count-1; i++)
                {
                    for (int j = i+1; j < kvp.Value.Count; j++)
                    {
                        if (kvp.Value[i].Equals(kvp.Value[j]))
                        {
                            count++;
                        }
                        if (i==kvp.Value.Count-2 && j==kvp.Value.Count-1 && !ipCounter.ContainsKey(kvp.Value[j]))
                        {
                            ipCounter.Add(kvp.Value[j], count);
                        }
                    }
                    if (ipCounter.ContainsKey(kvp.Value[i]))
                    {
                        count = 1;
                    }
                    else
                    {
                        ipCounter.Add(kvp.Value[i], count);
                        count = 1;
                    }
                }
                if (kvp.Value.Count == 1)
                {
                    ipCounter.Add(kvp.Value[0], 1);
                }
                Console.WriteLine("{0}:",kvp.Key);
                Console.Write(string.Join(", ", ipCounter.Select(x => string.Format("{0} => {1}", x.Key, x.Value))));
                Console.WriteLine(".");
                ipCounter.Clear();
            }
        }


    }
}