Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.KernelWrapper/Calculators/Input/SoilLayer.cs
===================================================================
diff -u -reb6d3b69267f3ae2870b25679793bbc0099338cd -r66964d0c53eb0d904f7ada3e3bbc1e9604e241e7
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.KernelWrapper/Calculators/Input/SoilLayer.cs	(.../SoilLayer.cs)	(revision eb6d3b69267f3ae2870b25679793bbc0099338cd)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.KernelWrapper/Calculators/Input/SoilLayer.cs	(.../SoilLayer.cs)	(revision 66964d0c53eb0d904f7ada3e3bbc1e9604e241e7)
@@ -77,7 +77,7 @@
         /// <summary>
         /// Gets the outer ring of the soil layer.
         /// </summary>
-        public Point2D[] OuterRing { get; }
+        public IEnumerable<Point2D> OuterRing { get; }
 
         /// <summary>
         /// Gets the nested layers of the soil layer.