Первый шаг

Stormtrooper/Stormtrooper/DrawningObjectStorm.cs

@@ -14,6 +14,7 @@ namespace Stormtrooper
             _storm = storm;
         }
         public float Step => _storm?.Storm?.Step ?? 0;
+        public Drawning GetStormtrooper => _storm;
         public (float Left, float Right, float Top, float Bottom) GetCurrentPosition()
         {
             return _storm?.GetCurrentPosition() ?? default;
@@ -35,5 +36,59 @@ namespace Stormtrooper
         public string GetInfo() => _storm?.GetDataForSave();
         public static IDrawningObject Create(string data) => new DrawningObjectStorm(data.CreateDrawningStormtrooper());
 
+        public bool Equals(IDrawningObject? other)
+        {
+            if (other == null)
+            {
+                return false;
+            }
+            var otherStorm = other as DrawningObjectStorm;
+            if (otherStorm == null)
+            {
+                return false;
+            }
+            var storm = _storm.Storm;
+            var otherStormStorm = otherStorm._storm.Storm;
+            if (storm.Speed != otherStormStorm.Speed)
+            {
+                return false;
+            }
+            if (storm.Weight != otherStormStorm.Weight)
+            {
+                return false;
+            }
+            if (storm.BodyColor != otherStormStorm.BodyColor)
+            {
+                return false;
+            }
+            if (storm is EntityMilitaryStormtrooper milstorm)
+            {
+                if (other is not EntityMilitaryStormtrooper othermilstorm)
+                {
+                    return false;
+                }
+
+                if (milstorm.DopColor != othermilstorm.DopColor)
+                {
+                    return false;
+                }
+
+                if (milstorm.BodyKit != othermilstorm.BodyKit)
+                {
+                    return false;
+                }
+
+                if (milstorm.Rocket != othermilstorm.Rocket)
+                {
+                    return false;
+                }
+
+                if (milstorm.SportLine != othermilstorm.SportLine)
+                {
+                    return false;
+                }
+            }
+            return true;
+        }
     }
 }

Stormtrooper/Stormtrooper/IDrawningObject.cs

@@ -9,7 +9,7 @@ namespace Stormtrooper
     /// <summary>
     /// Интерфейс для работы с объектом, прорисовываемым на форме
     /// </summary>
-    internal interface IDrawningObject
+    internal interface IDrawningObject : IEquatable<IDrawningObject>
     {
         /// <summary>
         /// Шаг перемещения объекта

Stormtrooper/Stormtrooper/SetStormtroopersGeneric.cs

@@ -11,7 +11,7 @@ namespace Stormtrooper
     /// </summary>
     /// <typeparam name="T"></typeparam>
     internal class SetStormtroopersGeneric<T>
-        where T : class
+        where T : class, IEquatable<T>
     {
         /// <summary>
         ///  Список объектов, которые храним
@@ -49,6 +49,10 @@ namespace Stormtrooper
         /// <returns></returns>
         public int Insert(T stormtrooper, int position)
         {
+            if (_places.Contains(stormtrooper))
+            {
+                throw new ArgumentException("Такой самолёт уже есть");
+            }
             if (position < 0 || position >= _maxCount)
                 throw new StorageOverflowException(_maxCount);
             if (_places.Count >= _maxCount) throw new StorageOverflowException(_maxCount);
@@ -105,5 +109,18 @@ namespace Stormtrooper
                 }
             }
         }
+        /// <summary>
+        /// Сортировка набора объектов
+        /// </summary>
+        /// <param name="comparer"></param>
+        public void SortSet(IComparer<T> comparer)
+        {
+            if (comparer == null)
+            {
+                return;
+            }
+            _places.Sort(comparer);
+        }
+
     }
 }