Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Application.Ringtoets.Storage.csproj
===================================================================
diff -u -r33d8b4610b6bc2979e35aa3e23b881a9933e40b5 -r658e6cf9291e16f0896bd44e4a0d03fbe1e46403
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Application.Ringtoets.Storage.csproj	(.../Application.Ringtoets.Storage.csproj)	(revision 33d8b4610b6bc2979e35aa3e23b881a9933e40b5)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Application.Ringtoets.Storage.csproj	(.../Application.Ringtoets.Storage.csproj)	(revision 658e6cf9291e16f0896bd44e4a0d03fbe1e46403)
@@ -445,7 +445,6 @@
     <Compile Include="Serializers\MacroStabilityInwardsSliceXmlSerializer.cs" />
     <Compile Include="Serializers\Point2DXmlSerializer.cs" />
     <Compile Include="Serializers\Point3DXmlSerializer.cs" />
-    <Compile Include="Serializers\RingXmlSerializer.cs" />
     <Compile Include="Serializers\RoughnessPointXmlSerializer.cs" />
     <Compile Include="Serializers\DataCollectionSerializer.cs" />
     <Compile Include="Create\AssessmentSectionCreateExtensions.cs" />
Fisheye: Tag 658e6cf9291e16f0896bd44e4a0d03fbe1e46403 refers to a dead (removed) revision in file `Application/Ringtoets/src/Application.Ringtoets.Storage/Serializers/RingXmlSerializer.cs'.
Fisheye: No comparison available.  Pass `N' to diff?
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Application.Ringtoets.Storage.Test.csproj
===================================================================
diff -u -r33d8b4610b6bc2979e35aa3e23b881a9933e40b5 -r658e6cf9291e16f0896bd44e4a0d03fbe1e46403
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Application.Ringtoets.Storage.Test.csproj	(.../Application.Ringtoets.Storage.Test.csproj)	(revision 33d8b4610b6bc2979e35aa3e23b881a9933e40b5)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Application.Ringtoets.Storage.Test.csproj	(.../Application.Ringtoets.Storage.Test.csproj)	(revision 658e6cf9291e16f0896bd44e4a0d03fbe1e46403)
@@ -176,7 +176,6 @@
     <Compile Include="Serializers\MacroStabilityInwardsSliceXmlSerializerTest.cs" />
     <Compile Include="Serializers\Point2DXmlSerializerTest.cs" />
     <Compile Include="Serializers\Point3DXmlSerializerTest.cs" />
-    <Compile Include="Serializers\RingXmlSerializerTest.cs" />
     <Compile Include="Serializers\RoughnessPointXmlSerializerTest.cs" />
     <Compile Include="Create\CalculationGroupCreateExtensionsTest.cs" />
     <Compile Include="Create\ClosingStructures\ClosingStructuresFailureMechanismCreateExtensionsTest.cs" />
@@ -298,6 +297,10 @@
       <Project>{E344867E-9AC9-44C8-88A5-8185681679A9}</Project>
       <Name>Core.Common.IO</Name>
     </ProjectReference>
+    <ProjectReference Include="..\..\..\..\Core\Common\src\Core.Common.Utils\Core.Common.Utils.csproj">
+      <Project>{F49BD8B2-332A-4C91-A196-8CCE0A2C7D98}</Project>
+      <Name>Core.Common.Utils</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\..\..\Core\Common\test\Core.Common.TestUtil\Core.Common.TestUtil.csproj">
       <Project>{D749EE4C-CE50-4C17-BF01-9A953028C126}</Project>
       <Name>Core.Common.TestUtil</Name>
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Read/MacroStabilityInwards/MacroStabilityInwardsSoilProfileTwoDEntityReadExtensionsTest.cs
===================================================================
diff -u -r1b7dec5dc5d682b37d0191d99da2ff640cc56022 -r658e6cf9291e16f0896bd44e4a0d03fbe1e46403
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Read/MacroStabilityInwards/MacroStabilityInwardsSoilProfileTwoDEntityReadExtensionsTest.cs	(.../MacroStabilityInwardsSoilProfileTwoDEntityReadExtensionsTest.cs)	(revision 1b7dec5dc5d682b37d0191d99da2ff640cc56022)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Read/MacroStabilityInwards/MacroStabilityInwardsSoilProfileTwoDEntityReadExtensionsTest.cs	(.../MacroStabilityInwardsSoilProfileTwoDEntityReadExtensionsTest.cs)	(revision 658e6cf9291e16f0896bd44e4a0d03fbe1e46403)
@@ -28,6 +28,7 @@
 using Application.Ringtoets.Storage.TestUtil.MacroStabilityInwards;
 using Core.Common.Base.Data;
 using Core.Common.Base.Geometry;
+using Core.Common.Utils.Extensions;
 using NUnit.Framework;
 using Ringtoets.Common.Data.Probabilistics;
 using Ringtoets.MacroStabilityInwards.Data.SoilProfile;
@@ -140,11 +141,7 @@
                 outerRingA
             }, profile.Layers.Select(l => l.OuterRing));
 
-            CollectionAssert.AreEqual(new[]
-            {
-                new Ring[0],
-                new Ring[0]
-            }, profile.Layers.Select(l => l.Holes));
+            profile.Layers.Select(l => l.NestedLayers).ForEachElementDo(CollectionAssert.IsEmpty);
 
             CollectionAssert.AreEqual(new[]
             {
Fisheye: Tag 658e6cf9291e16f0896bd44e4a0d03fbe1e46403 refers to a dead (removed) revision in file `Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Serializers/RingXmlSerializerTest.cs'.
Fisheye: No comparison available.  Pass `N' to diff?
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/RingtoetsProjectTestHelper.cs
===================================================================
diff -u -rf6dd19ee061fc2754d81eb3677c26fbdb504fc49 -r658e6cf9291e16f0896bd44e4a0d03fbe1e46403
--- Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/RingtoetsProjectTestHelper.cs	(.../RingtoetsProjectTestHelper.cs)	(revision f6dd19ee061fc2754d81eb3677c26fbdb504fc49)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/RingtoetsProjectTestHelper.cs	(.../RingtoetsProjectTestHelper.cs)	(revision 658e6cf9291e16f0896bd44e4a0d03fbe1e46403)
@@ -1119,92 +1119,80 @@
                                                                            soilLayer1D
                                                                        });
 
-            var soilLayer2D = new MacroStabilityInwardsSoilLayer2D(new Ring(new[]
-            {
-                new Point2D(0, 0),
-                new Point2D(1, 1)
-            }), new[]
-            {
+            var soilLayer2D = new MacroStabilityInwardsSoilLayer2D(
                 new Ring(new[]
                 {
-                    new Point2D(2, 2),
-                    new Point2D(3, 3)
-                })
-            }, new MacroStabilityInwardsSoilLayerData(), new[]
-            {
-                new MacroStabilityInwardsSoilLayer2D(new Ring(new[]
+                    new Point2D(0, 0),
+                    new Point2D(1, 1)
+                }), new Ring[0],
+                new MacroStabilityInwardsSoilLayerData(), new[]
                 {
-                    new Point2D(3, 3),
-                    new Point2D(4, 4)
-                }), new[]
-                {
-                    new Ring(new[]
+                    new MacroStabilityInwardsSoilLayer2D(new Ring(new[]
                     {
-                        new Point2D(5, 5),
-                        new Point2D(6, 6)
-                    })
-                })
-                {
-                    Data =
+                        new Point2D(3, 3),
+                        new Point2D(4, 4)
+                    }), new Ring[0])
                     {
-                        IsAquifer = true,
-                        MaterialName = "Navy",
-                        Color = Color.Navy,
-                        UsePop = true,
-                        ShearStrengthModel = MacroStabilityInwardsShearStrengthModel.CPhi,
-                        AbovePhreaticLevel = new VariationCoefficientLogNormalDistribution
+                        Data =
                         {
-                            Mean = (RoundedDouble) 15.901,
-                            CoefficientOfVariation = (RoundedDouble) 5.902,
-                            Shift = (RoundedDouble) 5.903
-                        },
-                        BelowPhreaticLevel = new VariationCoefficientLogNormalDistribution
+                            IsAquifer = true,
+                            MaterialName = "Navy",
+                            Color = Color.Navy,
+                            UsePop = true,
+                            ShearStrengthModel = MacroStabilityInwardsShearStrengthModel.CPhi,
+                            AbovePhreaticLevel = new VariationCoefficientLogNormalDistribution
+                            {
+                                Mean = (RoundedDouble) 15.901,
+                                CoefficientOfVariation = (RoundedDouble) 5.902,
+                                Shift = (RoundedDouble) 5.903
+                            },
+                            BelowPhreaticLevel = new VariationCoefficientLogNormalDistribution
+                            {
+                                Mean = (RoundedDouble) 5.906,
+                                CoefficientOfVariation = (RoundedDouble) 5.905,
+                                Shift = (RoundedDouble) 5.904
+                            },
+                            Cohesion = new VariationCoefficientLogNormalDistribution
+                            {
+                                Mean = (RoundedDouble) 5.907,
+                                CoefficientOfVariation = (RoundedDouble) 5.908
+                            },
+                            FrictionAngle = new VariationCoefficientLogNormalDistribution
+                            {
+                                Mean = (RoundedDouble) 5.909,
+                                CoefficientOfVariation = (RoundedDouble) 5.91
+                            },
+                            ShearStrengthRatio = new VariationCoefficientLogNormalDistribution
+                            {
+                                Mean = (RoundedDouble) 5.911,
+                                CoefficientOfVariation = (RoundedDouble) 5.912
+                            },
+                            StrengthIncreaseExponent = new VariationCoefficientLogNormalDistribution
+                            {
+                                Mean = (RoundedDouble) 5.913,
+                                CoefficientOfVariation = (RoundedDouble) 5.914
+                            },
+                            Pop = new VariationCoefficientLogNormalDistribution
+                            {
+                                Mean = (RoundedDouble) 5.915,
+                                CoefficientOfVariation = (RoundedDouble) 5.916
+                            }
+                        }
+                    },
+                    new MacroStabilityInwardsSoilLayer2D(new Ring(new[]
+                    {
+                        new Point2D(-10, -100),
+                        new Point2D(10, 100)
+                    }), new Ring[0])
+                    {
+                        Data =
                         {
-                            Mean = (RoundedDouble) 5.906,
-                            CoefficientOfVariation = (RoundedDouble) 5.905,
-                            Shift = (RoundedDouble) 5.904
-                        },
-                        Cohesion = new VariationCoefficientLogNormalDistribution
-                        {
-                            Mean = (RoundedDouble) 5.907,
-                            CoefficientOfVariation = (RoundedDouble) 5.908
-                        },
-                        FrictionAngle = new VariationCoefficientLogNormalDistribution
-                        {
-                            Mean = (RoundedDouble) 5.909,
-                            CoefficientOfVariation = (RoundedDouble) 5.91
-                        },
-                        ShearStrengthRatio = new VariationCoefficientLogNormalDistribution
-                        {
-                            Mean = (RoundedDouble) 5.911,
-                            CoefficientOfVariation = (RoundedDouble) 5.912
-                        },
-                        StrengthIncreaseExponent = new VariationCoefficientLogNormalDistribution
-                        {
-                            Mean = (RoundedDouble) 5.913,
-                            CoefficientOfVariation = (RoundedDouble) 5.914
-                        },
-                        Pop = new VariationCoefficientLogNormalDistribution
-                        {
-                            Mean = (RoundedDouble) 5.915,
-                            CoefficientOfVariation = (RoundedDouble) 5.916
+                            MaterialName = "HotPink",
+                            Color = Color.HotPink,
+                            ShearStrengthModel = MacroStabilityInwardsShearStrengthModel.SuCalculated
                         }
                     }
-                },
-                new MacroStabilityInwardsSoilLayer2D(new Ring(new[]
-                {
-                    new Point2D(-10, -100),
-                    new Point2D(10, 100)
-                }), new Ring[0])
-                {
-                    Data =
-                    {
-                        MaterialName = "HotPink",
-                        Color = Color.HotPink,
-                        ShearStrengthModel = MacroStabilityInwardsShearStrengthModel.SuCalculated
-                    }
-                }
-            })
+                })
             {
                 Data =
                 {