ProjectRoadTrain/ProjectRoadTrain/CollectionGenericObjects/ICollectionGenericObjects.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectRoadTrain.CollectionGenericObjects
+{
+    internal interface ICollectionGenericObjects
+    {
+    }
+}

ProjectRoadTrain/ProjectRoadTrain/CollectionGenericObjects/MassiveGenericObjects.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectRoadTrain.CollectionGenericObjects;
+
+public class MassiveGenericObjects<T> : ICollectionGenericObjects<T>
+    where T : class
+{
+    
+    private T?[] _collection;
+
+    public int Count => _collection.Length;
+
+    public int SetMaxCount
+    {
+        set
+        {
+            if (value > 0)
+            {
+                if (_collection.Length > 0)
+                {
+                    Array.Resize(ref _collection, value);
+                }
+                else
+                {
+                    _collection = new T?[value];
+                }
+            }
+        }
+    }
+
+    public MassiveGenericObjects()
+    {
+        _collection = Array.Empty<T?>();
+    }
+
+    public T? Get(int position)
+    {
+        if (position >= 0 && position < Count)
+        {
+            return _collection[position];
+        }
+
+        return null;
+    }
+
+    public int Insert(T obj)
+    {
+        for (int i = 0; i < Count; i++)
+        {
+            if (_collection[i] == null)
+            {
+                _collection[i] = obj;
+                return i;
+            }
+        }
+
+        return -1;
+    }
+
+    public int Insert(T obj, int position)
+    {
+        
+        if (position < 0 || position >= Count)
+        {
+            return -1;
+        }
+
+        if (_collection[position] != null)
+        {
+            bool pushed = false;
+            for (int index = position + 1; index < Count; index++)
+            {
+                if (_collection[index] == null)
+                {
+                    position = index;
+                    pushed = true;
+                    break;
+                }
+            }
+
+            if (!pushed)
+            {
+                for (int index = position - 1; index >= 0; index--)
+                {
+                    if (_collection[index] == null)
+                    {
+                        position = index;
+                        pushed = true;
+                        break;
+                    }
+                }
+            }
+
+            if (!pushed)
+            {
+                return position;
+            }
+        }
+
+        _collection[position] = obj;
+        return position;
+    }
+
+    public T? Remove(int position)
+    {
+        if (position < 0 || position >= Count)
+        {
+            return null;
+        }
+
+        if (_collection[position] == null) return null;
+
+        T? temp = _collection[position];
+        _collection[position] = null;
+        return temp;
+    }
+}