Implement LobbyServer

LobbyServer/ScoresManager.cs

@@ -0,0 +1,40 @@
+using System.Linq;
+using System;
+using System.IO;
+using System.Collections.Generic;
+using Newtonsoft.Json;
+
+namespace LobbyServer
+{
+    class ScoresManager
+    {
+        public const string FileName = "scores.json";
+        public string FilePath => Path.Combine(Environment.CurrentDirectory, FileName);
+
+        private List<ScoreEntry> _scores;
+        public IReadOnlyList<ScoreEntry> Scores => _scores.AsReadOnly();
+
+        public ScoresManager()
+        {
+            if (File.Exists("scores.json"))
+            {
+                _scores = JsonConvert.DeserializeObject<List<ScoreEntry>>(File.ReadAllText(FilePath));
+            }
+            else
+            {
+                _scores = new List<ScoreEntry>();
+            }
+        }
+
+        public void Add(ScoreEntry entry)
+        {
+            _scores.Add(entry);
+            _scores.OrderByDescending(x => x.Score);
+        }
+
+        public void Save()
+        {
+            File.WriteAllText(FilePath, JsonConvert.SerializeObject(_scores));
+        }
+    }
+}