Index: Ringtoets/Common/src/Ringtoets.Common.IO/FailureMechanismSectionReader.cs
===================================================================
diff -u -rac96d7c315129af851634ed5a4a6800b59ede718 -r83ac738ad69ef53eba6ca4f647657e5b7f024b96
--- Ringtoets/Common/src/Ringtoets.Common.IO/FailureMechanismSectionReader.cs	(.../FailureMechanismSectionReader.cs)	(revision ac96d7c315129af851634ed5a4a6800b59ede718)
+++ Ringtoets/Common/src/Ringtoets.Common.IO/FailureMechanismSectionReader.cs	(.../FailureMechanismSectionReader.cs)	(revision 83ac738ad69ef53eba6ca4f647657e5b7f024b96)
@@ -158,7 +158,7 @@
                 throw CreateCriticalFileReadException(RingtoetsCommonIOResources.FailureMechanismSectionReader_File_has_unsupported_multiPolyline);
             }
 
-            return mapGeometries[0].PointCollections.First().Select(p => new Point2D(p));
+            return mapGeometries[0].PointCollections.First().Select(p => new Point2D(p)).ToArray();
         }
 
         private CriticalFileReadException CreateCriticalFileReadException(string message)