Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/Views/DesignWaterLevelLocationsView.cs
===================================================================
diff -u -r6de162f9e652176605480f16f131ae9a14fbe05f -r4d27fbfd1ca8ab3c6be40cf056eb11d8d82e09d4
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/Views/DesignWaterLevelLocationsView.cs	(.../DesignWaterLevelLocationsView.cs)	(revision 6de162f9e652176605480f16f131ae9a14fbe05f)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/Views/DesignWaterLevelLocationsView.cs	(.../DesignWaterLevelLocationsView.cs)	(revision 4d27fbfd1ca8ab3c6be40cf056eb11d8d82e09d4)
@@ -141,7 +141,7 @@
 
         private IEnumerable<DesignWaterLevelLocationContextRow> GetDesignWaterLevelLocationContextRows()
         {
-            return from DataGridViewRow row in dataGridViewControl.Rows select (DesignWaterLevelLocationContextRow) row.DataBoundItem;
+            return dataGridViewControl.Rows.Cast<DataGridViewRow>().Select(row => (DesignWaterLevelLocationContextRow) row.DataBoundItem);
         }
 
         private IEnumerable<HydraulicBoundaryLocation> GetSelectedDesignWaterLevelLocationContext()