Index: Ringtoets/HydraRing/src/Ringtoets.HydraRing.Data/HydraulicBoundaryDatabase.cs
===================================================================
diff -u -rc6dd26c14af11a7e13f783f578466e46b463165a -r33c64ea2cd6b287bf5954e63a548d89dadb7f153
--- Ringtoets/HydraRing/src/Ringtoets.HydraRing.Data/HydraulicBoundaryDatabase.cs	(.../HydraulicBoundaryDatabase.cs)	(revision c6dd26c14af11a7e13f783f578466e46b463165a)
+++ Ringtoets/HydraRing/src/Ringtoets.HydraRing.Data/HydraulicBoundaryDatabase.cs	(.../HydraulicBoundaryDatabase.cs)	(revision 33c64ea2cd6b287bf5954e63a548d89dadb7f153)
@@ -51,6 +51,6 @@
         /// <summary>
         /// Gets the hydraulic boundary locations.
         /// </summary>
-        public IEnumerable<HydraulicBoundaryLocation> Locations { get; private set; }
+        public ICollection<HydraulicBoundaryLocation> Locations { get; private set; }
     }
 }
\ No newline at end of file