Приведено к рабочему виду из лекции

Trolleybus/Trolleybus/DrawningObject.cs

@@ -41,7 +41,9 @@ namespace Trolleybus
 
         void IDrawningObject.DrawningObject(Graphics g)
         {
-            // TODO
+            _trolleybus.DrawTransport(g);
         }
+        public string GetInfo() => _trolleybus?.GetDataForSave();
+        public static IDrawningObject Create(string data) => new DrawningObjectTrolleybus(data.CreateDrawingTrolleybus());
     }
 }

Trolleybus/Trolleybus/DrawningObjectTrolleybus.cs

@@ -42,5 +42,12 @@ namespace Trolleybus
         {
             _trolleybus.DrawTransport(g);
         }
+
+        public string GetInfo() => _trolleybus?.GetDataForSave();
+
+        public static IDrawningObject Create(string data)
+        {
+            return new DrawningObjectTrolleybus(data.CreateDrawingTrolleybus());
+        }
     }
 }

Trolleybus/Trolleybus/ExtentionTrolleybus.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Trolleybus
+{
+    internal static class ExtentionTrolleybus
+    {
+        private static readonly char _separatorForObject = ':';
+        public static DrawingTrolleybus CreateDrawingTrolleybus(this string info)
+        {
+            string[] strs = info.Split(_separatorForObject);
+            if (strs.Length == 3)
+            {
+                return new DrawingTrolleybus(Convert.ToInt32(strs[0]),
+                    Convert.ToInt32(strs[1]), Color.FromName(strs[2]));
+            }
+            if (strs.Length == 6)
+            {
+                return new DrawningSmallTrolleybus(Convert.ToInt32(strs[0]),
+                    Convert.ToInt32(strs[1]), Color.FromName(strs[2]),
+                    Color.FromName(strs[3]), Convert.ToBoolean(strs[4]),
+                    Convert.ToBoolean(strs[5]), Convert.ToBoolean(strs[6]));
+            }
+            return null;
+        }
+
+        public static string GetDataForSave(this DrawingTrolleybus drawningTrolleybus)
+        {
+            var trolleybus = drawningTrolleybus.Trolleybus;
+            var str = $"{trolleybus.Speed}{_separatorForObject}{trolleybus.Weight}{_separatorForObject}{trolleybus.BodyColor.Name}";
+            if (trolleybus is not EntitySmallTrolleybus smallTrolleybus)
+            {
+                return str;
+            }
+            return $"{str}{_separatorForObject}{smallTrolleybus.DopColor.Name}{_separatorForObject}{smallTrolleybus.Horns}{_separatorForObject}{smallTrolleybus.Battary}";
+        }
+    }
+}

Trolleybus/Trolleybus/IDrawingObject.cs

@@ -38,5 +38,6 @@ namespace Trolleybus
 		/// <returns></returns>
 		void nothing();
 		(float Left, float Right, float Top, float Bottom) GetCurrentPosition();
+		string GetInfo();
 	}
 }

Trolleybus/Trolleybus/MapWithSetTrolleybusGeneric.cs

@@ -112,6 +112,24 @@ namespace Trolleybus
             }
             return new(_pictureWidth, _pictureHeight);
         }
+
+        public string GetData(char separatorType, char separatorData)
+        {
+            string data = $"{_map.GetType().Name}{separatorType}";
+            foreach (var tractor in _setTrolleybus.GetTrolleybus())
+            {
+                data += $"{tractor.GetInfo()}{separatorData}";
+            }
+            return data;
+        }
+
+        public void LoadData(string[] records)
+        {
+            foreach (var rec in records)
+            {
+                _setTrolleybus.Insert(DrawningObjectTrolleybus.Create(rec) as T);
+            }
+        }
         /// <summary>
         /// "Взбалтываем" набор, чтобы все элементы оказались в начале
         /// </summary>

Trolleybus/Trolleybus/MapsCollection.cs

@@ -1,15 +1,17 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using static System.Net.Mime.MediaTypeNames;
 
 namespace Trolleybus
 {
     internal class MapsCollection
     {
         /// Словарь (хранилище) с картами
-        readonly Dictionary<string, MapWithSetTrolleybusGeneric<DrawningObjectTrolleybus,
+        readonly Dictionary<string, MapWithSetTrolleybusGeneric<IDrawningObject,
         AbstractMap>> _mapStorages;
         /// Возвращение списка названий карт
         public List<string> Keys => _mapStorages.Keys.ToList();
@@ -17,13 +19,15 @@ namespace Trolleybus
         private readonly int _pictureWidth;
         /// Высота окна отрисовки
         private readonly int _pictureHeight;
+        private readonly char separatorDict = '|';
+        private readonly char separatorData = ';';
         /// Конструктор
         /// <param name="pictureWidth"></param>
         /// <param name="pictureHeight"></param>
         public MapsCollection(int pictureWidth, int pictureHeight)
         {
             _mapStorages = new Dictionary<string,
-            MapWithSetTrolleybusGeneric<DrawningObjectTrolleybus, AbstractMap>>();
+            MapWithSetTrolleybusGeneric<IDrawningObject, AbstractMap>>();
             _pictureWidth = pictureWidth;
             _pictureHeight = pictureHeight;
         }
@@ -45,13 +49,67 @@ namespace Trolleybus
         /// Доступ к депо
         /// <param name="ind"></param>
         /// <returns></returns>
-        public MapWithSetTrolleybusGeneric<DrawningObjectTrolleybus, AbstractMap> this[string ind]
+        public MapWithSetTrolleybusGeneric<IDrawningObject, AbstractMap> this[string ind]
         {
             get
             {
-                _mapStorages.TryGetValue(ind, out var mapWithSetTractorsGeneric);
-                return mapWithSetTractorsGeneric;
+                _mapStorages.TryGetValue(ind, out var mapWithSetTrolleybusGeneric);
+                return mapWithSetTrolleybusGeneric;
             }
         }
+
+        public bool SaveData(string filename)
+        {
+            if (File.Exists(filename))
+            {
+                File.Delete(filename);
+            }
+            using (StreamWriter sw = new(filename))
+            {
+                sw.Write($"MapsCollection{Environment.NewLine}");
+                foreach (var storage in _mapStorages)
+                {
+                    sw.Write($"{storage.Key}{separatorDict}{storage.Value.GetData(separatorDict, separatorData)}{Environment.NewLine}");
+                }
+
+            }
+            return true;
+        }
+
+        public bool LoadData(string filename)
+        {
+            if (!File.Exists(filename))
+            {
+                return false;
+            }
+            using (StreamReader sr = new(filename))
+            {
+                string str = "";
+                if ((str = sr.ReadLine()) == null || !str.Contains("MapsCollection"))
+                {
+                    //если нет такой записи, то это не те данные
+                    return false;
+                }
+                //очищаем записи
+                _mapStorages.Clear();
+                while ((str = sr.ReadLine()) != null)
+                {
+                    var elem = str.Split(separatorDict);
+                    AbstractMap map = null;
+                    switch (elem[1])
+                    {
+                        case "SimpleMap":
+                            map = new SimpleMap();
+                            break;
+                        case "HardMap":
+                            map = new AutoStopMap();
+                            break;
+                    }
+                    _mapStorages.Add(elem[0], new MapWithSetTrolleybusGeneric<IDrawningObject, AbstractMap>(_pictureWidth, _pictureHeight, map));
+                    _mapStorages[elem[0]].LoadData(elem[2].Split(separatorData, (char)StringSplitOptions.RemoveEmptyEntries));
+                }
+            }
+            return true;
+        }
     }
 }

Trolleybus/Trolleybus/SetTrolleybusGeneric.cs

@@ -68,13 +68,13 @@ namespace Trolleybus
                 Insert(value, position);
             }
         }
-        public IEnumerable<T> GetTractors()
+        public IEnumerable<T> GetTrolleybus()
         {
-            foreach (var tractor in _places)
+            foreach (var trolleybus in _places)
             {
-                if (tractor != null)
+                if (trolleybus != null)
                 {
-                    yield return tractor;
+                    yield return trolleybus;
                 }
                 else
                 {

Trolleybus/Trolleybus/Trolleybus.csproj

@@ -55,6 +55,7 @@
     <Compile Include="DrawningObjectTrolleybus.cs" />
     <Compile Include="EntitySmallTrolleybus.cs" />
     <Compile Include="EntityTrolleybus.cs" />
+    <Compile Include="ExtentionTrolleybus.cs" />
     <Compile Include="Form1.cs">
       <SubType>Form</SubType>
     </Compile>