Index: Ringtoets/Common/src/Ringtoets.Common.Forms/TreeNodeInfos/RingtoetsContextMenuItemFactory.cs
===================================================================
diff -u -r72fae487f4d6debd3cec5157de8796827bf27a0c -rc50d495de60db188ded1147be4d6d64d7ea29a2a
--- Ringtoets/Common/src/Ringtoets.Common.Forms/TreeNodeInfos/RingtoetsContextMenuItemFactory.cs	(.../RingtoetsContextMenuItemFactory.cs)	(revision 72fae487f4d6debd3cec5157de8796827bf27a0c)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/TreeNodeInfos/RingtoetsContextMenuItemFactory.cs	(.../RingtoetsContextMenuItemFactory.cs)	(revision c50d495de60db188ded1147be4d6d64d7ea29a2a)
@@ -367,7 +367,7 @@
 
         private static void SetStateWithEnableFunction<T>(T context, Func<T, string> enableFunction, StrictContextMenuItem menuItem)
         {
-            string validationText = enableFunction != null ? enableFunction(context) : null;
+            string validationText = enableFunction?.Invoke(context);
             if (!string.IsNullOrEmpty(validationText))
             {
                 menuItem.Enabled = false;