Использовал StreamWriter и StreamReader

ProjectExcavator/ProjectExcavator/CollectionGenericObjects/StorageCollection.cs

@@ -112,24 +112,24 @@ public class StorageCollection<T>
             File.Delete(filename);
         }
 
-        StringBuilder sb = new();
-
-        sb.Append(_collectionKey);
+        using (StreamWriter writer = new StreamWriter(filename))
+        {
+            writer.Write(_collectionKey);
             foreach (KeyValuePair<string, ICollectionGenericObjects<T>> value in _storages)
             {
-            sb.Append(Environment.NewLine);
+                writer.Write(Environment.NewLine);
                 // не сохраняем пустые коллекции
                 if (value.Value.Count == 0)
                 {
                     continue;
                 }
 
-            sb.Append(value.Key);
-            sb.Append(_separatorForKeyValue);
-            sb.Append(value.Value.GetCollectionType);
-            sb.Append(_separatorForKeyValue);
-            sb.Append(value.Value.MaxCount);
-            sb.Append(_separatorForKeyValue);
+                writer.Write(value.Key);
+                writer.Write(_separatorForKeyValue);
+                writer.Write(value.Value.GetCollectionType);
+                writer.Write(_separatorForKeyValue);
+                writer.Write(value.Value.MaxCount);
+                writer.Write(_separatorForKeyValue);
 
                 foreach (T? item in value.Value.GetItems())
                 {
@@ -139,14 +139,11 @@ public class StorageCollection<T>
                         continue;
                     }
 
-                sb.Append(data);
-                sb.Append(_separatorItems);
+                    writer.Write(data);
+                    writer.Write(_separatorItems);
+                }
             }
         }
-
-        using FileStream fs = new(filename, FileMode.Create);
-        byte[] info = new UTF8Encoding(true).GetBytes(sb.ToString());
-        fs.Write(info, 0, info.Length);
         return true;
     }
 
@@ -162,33 +159,26 @@ public class StorageCollection<T>
             return false;
         }
 
-        string bufferTextFromFile = "";
-        using (FileStream fs = new(filename, FileMode.Open))
+        using (StreamReader reader = File.OpenText(filename))
         {
-            byte[] b = new byte[fs.Length];
-            UTF8Encoding temp = new(true);
-            while (fs.Read(b, 0, b.Length) > 0)
-            {
-                bufferTextFromFile += temp.GetString(b);
-            }
-        }
+            string str = reader.ReadLine();
 
-        string[] strs = bufferTextFromFile.Split(new char[] { '\n', '\r'}, StringSplitOptions.RemoveEmptyEntries);
-        if (strs == null || strs.Length == 0)
+            if (str == null || str.Length == 0)
             {
                 return false;
             }
 
-        if (!strs[0].Equals(_collectionKey))
+            if (!str.StartsWith(_collectionKey))
             {
                 //если нет такой записи, то это не те данные
                 return false;
             }
 
             _storages.Clear();
-        foreach (string data in strs)
+            string strs = "";
+            while ((strs = reader.ReadLine()) != null)
             {
-            string[] record = data.Split(_separatorForKeyValue, StringSplitOptions.RemoveEmptyEntries);
+                string[] record = strs.Split(_separatorForKeyValue, StringSplitOptions.RemoveEmptyEntries);
                 if (record.Length != 4)
                 {
                     continue;
@@ -217,7 +207,7 @@ public class StorageCollection<T>
 
                 _storages.Add(record[0], collection);
             }
-
+        }
         return true;
     }
 

ProjectExcavator/ProjectExcavator/Drawnings/DrawningBulldozer.cs

@@ -1,4 +1,5 @@
 using ProjectExcavator.Entities;
+using System.Security.Policy;
 
 namespace ProjectExcavator.Drawnings;
 
@@ -99,9 +100,9 @@ public class DrawningBulldozer
     /// Конструктор, принимающий объект EntityBulldozer в качестве параметра
     /// </summary>
     /// <param name="entityBulldozer"></param>
-    public DrawningBulldozer(EntityBulldozer entityBulldozer)
+    public DrawningBulldozer(EntityBulldozer bull) : this()
     {
-        EntityBulldozer = entityBulldozer;
+        EntityBulldozer = new EntityBulldozer(bull.Speed, bull.Weight, bull.BodyColor);
     }
 
     /// <summary>

ProjectExcavator/ProjectExcavator/Drawnings/DrawningExcavator.cs

@@ -25,9 +25,9 @@ public class DrawningExcavator : DrawningBulldozer
     /// Конструктор, принимающий объект EntityBulldozer в качестве параметра
     /// </summary>
     /// <param name="entityBulldozer"></param>
-    public DrawningExcavator(EntityBulldozer entityBulldozer)
+    public DrawningExcavator(EntityExcavator exc) : base(150, 80)
     {
-        EntityBulldozer = entityBulldozer;
+        EntityBulldozer = new EntityExcavator(exc.Speed, exc.Weight, exc.BodyColor, exc.AdditionalColor, exc.Prop, exc.Ladle);
     }
 
     public override void DrawTransport(Graphics g)

ProjectExcavator/ProjectExcavator/Drawnings/ExtentionDrawningBulldozer.cs

@@ -23,7 +23,7 @@ public static class ExtentionDrawningBulldozer
         EntityBulldozer? bulldozer = EntityExcavator.CreateEntityExcavator(strs);
         if (bulldozer != null)
         {
-            return new DrawningExcavator(bulldozer);
+            return new DrawningExcavator((EntityExcavator)bulldozer);
         }
 
         bulldozer = EntityBulldozer.CreateEntityBulldozer(strs);