Index: DamEngine/trunk/src/Deltares.DamEngine.Data.Tests/Geotechnics/SoilProfile2DSurfaceLineHelperTests.cs
===================================================================
diff -u -r5261 -r5273
--- DamEngine/trunk/src/Deltares.DamEngine.Data.Tests/Geotechnics/SoilProfile2DSurfaceLineHelperTests.cs	(.../SoilProfile2DSurfaceLineHelperTests.cs)	(revision 5261)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data.Tests/Geotechnics/SoilProfile2DSurfaceLineHelperTests.cs	(.../SoilProfile2DSurfaceLineHelperTests.cs)	(revision 5273)
@@ -25,7 +25,6 @@
 using Deltares.DamEngine.Data.Geotechnics;
 using Deltares.DamEngine.Data.Standard;
 using Deltares.DamEngine.TestHelpers.Factories;
-using Deltares.DamEngine.TestHelpers.Geometry;
 using NUnit.Framework;
 
 namespace Deltares.DamEngine.Data.Tests.Geotechnics;
Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilProfile2DSurfaceLineHelper.cs
===================================================================
diff -u -r5261 -r5273
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilProfile2DSurfaceLineHelper.cs	(.../SoilProfile2DSurfaceLineHelper.cs)	(revision 5261)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilProfile2DSurfaceLineHelper.cs	(.../SoilProfile2DSurfaceLineHelper.cs)	(revision 5273)
@@ -349,14 +349,8 @@
         {
             return false;
         }
-        foreach (GeometryPoint point in layer.GeometrySurface.OuterLoop.Points)
-        {
-            if (point.Z.IsLessThan(surfaceLine.GetZatX(point.X)))
-            {
-                return false;
-            }
-        }
-        return true;
+
+        return layer.GeometrySurface.OuterLoop.Points.All(point => !point.Z.IsLessThan(surfaceLine.GetZatX(point.X)));
     }
     
     private static void ReconstructPreConsolidations(ref SoilProfile2D result, SoilProfile2D cloneProfile, double shift)