логикa сравнения

Catamaran/BoatCompareByColor.cs

@@ -11,8 +11,44 @@ namespace Catamaran
     {
         public int Compare(IDrawingObject x, IDrawingObject y)
         {
-            // TODO реализовать логику сравнения
+            // реализовать логику сравнения
-            throw new NotImplementedException();
+            if (x == null && y == null)
+            {
+                return 0;
+            }
+            if (x == null && y != null)
+            {
+                return 1;
+            }
+            if (x != null && y == null)
+            {
+                return -1;
+            }
+            var xBoat = x as DrawingObjectBoat;
+            var yBoat = y as DrawingObjectBoat;
+            if (xBoat == null && yBoat == null)
+            {
+                return 0;
+            }
+            if (xBoat == null && yBoat != null)
+            {
+                return 1;
+            }
+            if (xBoat != null && yBoat == null)
+            {
+                return -1;
+            }
+            int colorCompare = string.Compare(xBoat.GetBoat.Catamaran.BodyColor.Name, yBoat.GetBoat.Catamaran.BodyColor.Name);
+            if (colorCompare != 0)
+            {
+                return colorCompare;
+            }
+            var speedCompare = xBoat.GetBoat.Catamaran.Speed.CompareTo(yBoat.GetBoat.Catamaran.Speed);
+            if (speedCompare != 0)
+            {
+                return speedCompare;
+            }
+            return xBoat.GetBoat.Catamaran.Weight.CompareTo(yBoat.GetBoat.Catamaran.Weight);
         }
     }
 }