Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryLoop.cs
===================================================================
diff -u -r5618 -r5634
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryLoop.cs	(.../GeometryLoop.cs)	(revision 5618)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryLoop.cs	(.../GeometryLoop.cs)	(revision 5634)
@@ -264,15 +264,16 @@
     }
 
     /// <summary>
-    /// Determines if all curves in the loop are equal (by reference) to the curves of the given geometry loop.
+    /// Determines if all curves in the loop are equal to the curves of the given geometry loop.
+    /// The order of the curves does not matter, nor their direction.
     /// </summary>
     /// <param name="geometryLoop"></param>
     /// <returns>true when there are curves and they are equal, else false</returns>
-    public bool HasSameCurvesByReference(GeometryLoop geometryLoop)
+    public bool HasSameCurves(GeometryLoop geometryLoop)
     {
         foreach (GeometryCurve geometryCurve in CurveList)
         {
-            if (!geometryLoop.CurveList.Contains(geometryCurve))
+            if (!geometryLoop.HasSameCurveAtLocation(geometryCurve)) // .CurveList.Contains(geometryCurve))
             {
                 return false;
             }
@@ -281,6 +282,19 @@
         return CurveList.Count > 2 && CurveList.Count == geometryLoop.CurveList.Count;
     }
 
+    private bool HasSameCurveAtLocation(GeometryCurve geometryCurve)
+    {
+        foreach (GeometryCurve curve in CurveList)
+        {
+            if (curve.LocationEquals(geometryCurve))
+            {
+                return true;
+            }
+        }
+
+        return false;
+    }
+    
     /// <summary>
     /// Helper class NotEnoughUniquePointsException
     /// </summary>