Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryLoop.cs
===================================================================
diff -u -r4052 -r4184
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryLoop.cs	(.../GeometryLoop.cs)	(revision 4052)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryLoop.cs	(.../GeometryLoop.cs)	(revision 4184)
@@ -30,6 +30,8 @@
 /// <seealso cref="Deltares.DamEngine.Data.Geometry.GeometryPointString" />
 public class GeometryLoop : GeometryPointString
 {
+    private readonly Routines2D routines2D = new Routines2D(); 
+    
     /// <summary>
     /// List of points that describe the physical surface line or surface.
     /// </summary>
@@ -120,7 +122,7 @@
     public bool IsClockWise()
     {
         List<Point2D> polyGon = GetLocalPoint2DList();
-        Clockwise isClockWise = Routines2D.IsClockWise(polyGon);
+        Clockwise isClockWise = routines2D.IsClockWise(polyGon);
         if (isClockWise == Clockwise.NotEnoughUniquePoints)
         {
             throw new NotEnoughUniquePointsException();
@@ -141,7 +143,7 @@
     /// <returns></returns>
     public bool IsPointInLoopArea(Point2D aPoint)
     {
-        return Routines2D.CheckIfPointIsInPolygon(this, aPoint.X, aPoint.Z) != PointInPolygon.OutsidePolygon;
+        return routines2D.CheckIfPointIsInPolygon(this, aPoint.X, aPoint.Z) != PointInPolygon.OutsidePolygon;
     }
 
     /// <summary>