Index: Core/Common/src/Core.Common.Base/Data/RoundedPoint2DCollection.cs
===================================================================
diff -u -r67284323e2785c651633d9c52049ba12a9c70e6a -rddfbcebcaa9061cbd6a374da318263b2efed6808
--- Core/Common/src/Core.Common.Base/Data/RoundedPoint2DCollection.cs	(.../RoundedPoint2DCollection.cs)	(revision 67284323e2785c651633d9c52049ba12a9c70e6a)
+++ Core/Common/src/Core.Common.Base/Data/RoundedPoint2DCollection.cs	(.../RoundedPoint2DCollection.cs)	(revision ddfbcebcaa9061cbd6a374da318263b2efed6808)
@@ -55,10 +55,9 @@
                 throw new ArgumentOutOfRangeException(nameof(numberOfDecimalPlaces), @"Value must be in range [0, 15].");
             }
 
-            points = originalPoints.Select(p =>
-                                               new Point2D(
-                                                   new RoundedDouble(numberOfDecimalPlaces, p.X),
-                                                   new RoundedDouble(numberOfDecimalPlaces, p.Y)));
+            points = originalPoints.Select(p => new Point2D(new RoundedDouble(numberOfDecimalPlaces, p.X),
+                                                            new RoundedDouble(numberOfDecimalPlaces, p.Y)))
+                                   .ToArray();
 
             NumberOfDecimalPlaces = numberOfDecimalPlaces;
         }
Index: Ringtoets/Common/src/Ringtoets.Common.Data/MechanismSurfaceLineBase.cs
===================================================================
diff -u -rfb53511dc5ba3dde353125e2a2886d8e24ee2122 -rddfbcebcaa9061cbd6a374da318263b2efed6808
--- Ringtoets/Common/src/Ringtoets.Common.Data/MechanismSurfaceLineBase.cs	(.../MechanismSurfaceLineBase.cs)	(revision fb53511dc5ba3dde353125e2a2886d8e24ee2122)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/MechanismSurfaceLineBase.cs	(.../MechanismSurfaceLineBase.cs)	(revision ddfbcebcaa9061cbd6a374da318263b2efed6808)
@@ -142,21 +142,19 @@
         {
             ValidateHasPoints();
 
-            Point2D[] localGeometry = LocalGeometry.ToArray();
-
             if (!ValidateInRange(l))
             {
-                var localRangeL = new Range<double>(localGeometry[0].X, localGeometry[localGeometry.Length - 1].X);
+                var localRangeL = new Range<double>(LocalGeometry.First().X, LocalGeometry.Last().X);
                 string outOfRangeMessage = string.Format(Resources.MechanismSurfaceLineBase_0_L_needs_to_be_in_Range_1_,
                                                          Resources.MechanismSurfaceLineBase_GetZAtL_Cannot_determine_height,
                                                          localRangeL.ToString(FormattableConstants.ShowAtLeastOneDecimal, CultureInfo.CurrentCulture));
                 throw new ArgumentOutOfRangeException(null, outOfRangeMessage);
             }
 
             var segments = new Collection<Segment2D>();
-            for (var i = 1; i < localGeometry.Length; i++)
+            for (var i = 1; i < LocalGeometry.Count(); i++)
             {
-                segments.Add(new Segment2D(localGeometry[i - 1], localGeometry[i]));
+                segments.Add(new Segment2D(LocalGeometry.ElementAt(i - 1), LocalGeometry.ElementAt(i)));
             }
 
             IEnumerable<Point2D> intersectionPoints = Math2D.SegmentsIntersectionWithVerticalLine(segments, l).OrderBy(p => p.Y).ToArray();