fixed

TMI-practicum/Intersection.cs

@@ -10,5 +10,23 @@ namespace TMI_practicum
             X = x;
             Y = y;
         }
+
+        public override int GetHashCode()
+        {
+            return X.GetHashCode() ^ Y.GetHashCode();
+        }
+
+        public override bool Equals(object obj)
+        {
+            return obj is Intersection && this == (Intersection) obj;
+        }
+        public static bool operator ==(Intersection x, Intersection y) 
+        {
+            return x.X == y.X && x.Y == y.Y;
+        }
+        public static bool operator !=(Intersection x, Intersection y) 
+        {
+            return !(x == y);
+        }
     }
 }