Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsOutputChartControl.cs
===================================================================
diff -u -r8f4f49daca3074460478b3236bde0511fb7fbe56 -rc91246ef0f88eff9950857a6f2c404653a022dcc
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsOutputChartControl.cs	(.../MacroStabilityInwardsOutputChartControl.cs)	(revision 8f4f49daca3074460478b3236bde0511fb7fbe56)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsOutputChartControl.cs	(.../MacroStabilityInwardsOutputChartControl.cs)	(revision c91246ef0f88eff9950857a6f2c404653a022dcc)
@@ -22,7 +22,6 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Windows.Forms;
-using Core.Common.Base.Geometry;
 using Core.Common.Utils.Extensions;
 using Core.Components.Chart.Data;
 using Core.Components.Chart.Forms;
@@ -205,21 +204,18 @@
                 if (surfaceLine != null)
                 {
                     IMacroStabilityInwardsSoilProfileUnderSurfaceLine soilProfileUnderSurfaceLine = data.InputParameters.SoilProfileUnderSurfaceLine;
-                    List<IMacroStabilityInwardsSoilLayerUnderSurfaceLine> soilLayers = soilProfileUnderSurfaceLine.Layers.ToList();
-                    for (var i = 0; i < soilLayers.Count; i++)
+                    var i = 0;
+                    foreach (IMacroStabilityInwardsSoilLayerUnderSurfaceLine soilLayer in soilProfileUnderSurfaceLine.Layers)
                     {
-                        ChartMultipleAreaData soilLayerData = soilLayerChartDataLookup[i];
-                        soilLayerData.Areas = MacroStabilityInwardsChartDataPointsFactory.CreateOuterRingPoints(soilLayers[i]);
+                        ChartMultipleAreaData soilLayerData = soilLayerChartDataLookup[i++];
+                        soilLayerData.Areas = MacroStabilityInwardsChartDataPointsFactory.CreateOuterRingArea(soilLayer);
                     }
 
                     soilLayerChartDataLookup.Last().Areas = MacroStabilityInwardsChartDataPointsFactory.CreateHolesAreas(soilProfileUnderSurfaceLine);
                 }
                 else
                 {
-                    for (var i = 0; i < GetSoilLayers().Count(); i++)
-                    {
-                        soilLayerChartDataLookup[i].Areas = Enumerable.Empty<Point2D[]>();
-                    }
+                    MacroStabilityInwardsChartDataPointsFactory.SetEmptyAreas(soilLayerChartDataLookup);
                 }
             }
         }