Этап 2. Класс MapsCollection

Battleship/Battleship/MapsCollection.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Battleship
+{
+    internal class MapsCollection
+    {
+        readonly Dictionary<string, MapWithSetBattleshipGeneric<DrawningObjectBattleship, AbstractMap>> _mapStorage;
+
+        public List<string> Keys => _mapStorage.Keys.ToList();
+
+        private readonly int _pictureWidth;
+
+        private readonly int _pictureHeight;
+
+        public MapsCollection(int pictureWidth, int pictureHeight)
+        {
+            _mapStorage = new Dictionary<string, MapWithSetBattleshipGeneric<DrawningObjectBattleship, AbstractMap>>();
+            _pictureWidth = pictureWidth;
+            _pictureHeight = pictureHeight;
+        }
+        public void AddMap(string name, AbstractMap map)
+        {
+            var NewElem = new MapWithSetBattleshipGeneric<DrawningObjectBattleship, AbstractMap>(
+            _pictureWidth, _pictureHeight, map);
+            _mapStorage.Add(name, NewElem);
+        }
+        public void DelMap(string name)
+        {
+            _mapStorage.Remove(name);
+        }
+        public MapWithSetBattleshipGeneric<DrawningObjectBattleship, AbstractMap> this[string ind]
+        {
+            get
+            {
+                return _mapStorage[ind];
+            }
+        }
+    }
+}