Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/ThrowHelper.cs
===================================================================
diff -u -r6436 -r6980
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/ThrowHelper.cs	(.../ThrowHelper.cs)	(revision 6436)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/ThrowHelper.cs	(.../ThrowHelper.cs)	(revision 6980)
@@ -262,7 +262,7 @@
     {
         if (!File.Exists(fileName))
         {
-            throw new FileNotFoundException(string.Format(GetResourceString(resourceNamesName), $"{(fileName ?? "")} in {DamProject.ProjectWorkingPath}"));
+            throw new FileNotFoundException(string.Format(GetResourceString(resourceNamesName), $"{fileName ?? ""} in {DamProject.ProjectWorkingPath}"));
         }
     }