Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Forms/PresentationObjects/ClosingStructuresCalculationGroupContext.cs
===================================================================
diff -u -r8b60c9e846480f3ffeeb263bfea5d3367bf6bee3 -r3ddd2dfb07fb310dd90d5aac12e213d188c87a9a
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Forms/PresentationObjects/ClosingStructuresCalculationGroupContext.cs	(.../ClosingStructuresCalculationGroupContext.cs)	(revision 8b60c9e846480f3ffeeb263bfea5d3367bf6bee3)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Forms/PresentationObjects/ClosingStructuresCalculationGroupContext.cs	(.../ClosingStructuresCalculationGroupContext.cs)	(revision 3ddd2dfb07fb310dd90d5aac12e213d188c87a9a)
@@ -21,6 +21,7 @@
 
 using System;
 using System.Collections.Generic;
+using Core.Common.Controls.PresentationObjects;
 using Ringtoets.ClosingStructures.Data;
 using Ringtoets.Common.Data.AssessmentSection;
 using Ringtoets.Common.Data.Calculation;
@@ -76,5 +77,22 @@
         }
 
         public CalculationGroup Parent { get; }
+
+        public override bool Equals(WrappedObjectContextBase<CalculationGroup> other)
+        {
+            return base.Equals(other)
+                   && other is ClosingStructuresCalculationGroupContext
+                   && ReferenceEquals(Parent, ((ClosingStructuresCalculationGroupContext)other).Parent);
+        }
+
+        public override bool Equals(object obj)
+        {
+            return Equals(obj as ClosingStructuresCalculationGroupContext);
+        }
+
+        public override int GetHashCode()
+        {
+            return base.GetHashCode() ^ Parent.GetHashCode();
+        }
     }
 }
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