Index: Application/Ringtoets/src/Application.Ringtoets.Storage/DbContext/SurfaceLineEntity.cs
===================================================================
diff -u -r9e1b97e9540df6cbd635120135c83de0260aa6d1 -r6059a4af5c28390c79efa4e808e28cc93eeddac1
--- Application/Ringtoets/src/Application.Ringtoets.Storage/DbContext/SurfaceLineEntity.cs	(.../SurfaceLineEntity.cs)	(revision 9e1b97e9540df6cbd635120135c83de0260aa6d1)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/DbContext/SurfaceLineEntity.cs	(.../SurfaceLineEntity.cs)	(revision 6059a4af5c28390c79efa4e808e28cc93eeddac1)
@@ -38,6 +38,7 @@
         [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
         public SurfaceLineEntity()
         {
+            this.PipingCalculationEntities = new HashSet<PipingCalculationEntity>();
             this.SurfaceLinePointEntities = new HashSet<SurfaceLinePointEntity>();
         }
     
@@ -49,6 +50,8 @@
     
         public virtual FailureMechanismEntity FailureMechanismEntity { get; set; }
         [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
+        public virtual ICollection<PipingCalculationEntity> PipingCalculationEntities { get; set; }
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
         public virtual ICollection<SurfaceLinePointEntity> SurfaceLinePointEntities { get; set; }
     }
 }