Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilProfile2D.cs
===================================================================
diff -u -r5205 -r5210
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilProfile2D.cs	(.../SoilProfile2D.cs)	(revision 5205)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilProfile2D.cs	(.../SoilProfile2D.cs)	(revision 5210)
@@ -211,8 +211,8 @@
     /// <param name="oldSurfaces"></param>
     /// <param name="shift"></param>
     /// <returns></returns>
-    private SoilLayer2D GetOriginalLayerFromOldSurfaces(GeometrySurface geometrySurface, IEnumerable<SoilLayer2D> oldSurfaces,
-                                                        double shift)
+    private static SoilLayer2D GetOriginalLayerFromOldSurfaces(GeometrySurface geometrySurface, IEnumerable<SoilLayer2D> oldSurfaces,
+                                                               double shift)
     {
       Point2D point = new Point2D(0.0, 0.0);
       bool flag1 = false;