significant improvements to server selector

ServerSelector/GameSettings.cs

@@ -0,0 +1,51 @@
+using System;
+using System.IO;
+using System.Text.Json;
+
+namespace ServerSelector
+{
+    public class GameSettings
+    {
+        private static GameSettings? _settings;
+        public string GameRoot { get; set; } = "C:\\Nikke";
+        public string LastIp { get; set; } = "127.0.0.1";
+        public int LastOffset { get; set; }
+
+        public static GameSettings Settings
+        {
+            get
+            {
+                if (_settings != null)
+                    return _settings;
+
+                string path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "serverselectorsettings.json");
+
+                try
+                {
+                    if (File.Exists(path))
+                    {
+                        string json = File.ReadAllText(path);
+                        _settings = JsonSerializer.Deserialize<GameSettings>(json);
+                    }
+                }
+                catch
+                {
+
+                }
+
+                if (_settings == null)
+                {
+                    _settings = new();
+                }
+
+                return _settings;
+            }
+        }
+
+        public static void Save()
+        {
+            string path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "serverselectorsettings.json");
+            File.WriteAllText(path, JsonSerializer.Serialize(_settings));
+        }
+    }
+}