diff --git a/isometric-park-fna/Tile.cs b/isometric-park-fna/Tile.cs
--- a/isometric-park-fna/Tile.cs
+++ b/isometric-park-fna/Tile.cs
@@ -21,11 +21,16 @@
 			return !(left == right);
 		}
 
-		public bool Equals(Object other) {
+		public override bool Equals(Object other) {
 			return ((other != null) 
 					&& ! this.GetType().Equals(other.GetType()) 
 					&& this == (Edge)other); //we just confirmed the types match so this is okay
-	}
+		}
+
+		public override int GetHashCode() {
+			// return HashCode.Combine(Start, End);
+			return (Start, End).GetHashCode();
+		}
 
     }
     public class Tile