Index: DamClients/DamUI/branches/DamUI 19.1/src/DamClientsLibrary/Deltares.Dam.Data/CsvExportData.cs
===================================================================
diff -u -r3585 -r3586
--- DamClients/DamUI/branches/DamUI 19.1/src/DamClientsLibrary/Deltares.Dam.Data/CsvExportData.cs	(.../CsvExportData.cs)	(revision 3585)
+++ DamClients/DamUI/branches/DamUI 19.1/src/DamClientsLibrary/Deltares.Dam.Data/CsvExportData.cs	(.../CsvExportData.cs)	(revision 3586)
@@ -224,7 +224,7 @@
                 {
                     const string wmfExtension = ".wmf";
                     string fullBaseFilename = DamProject.ProjectWorkingPath;
-                    if (CalculationSubDir != "")
+                    if (!string.IsNullOrEmpty(CalculationSubDir))
                     {
                         fullBaseFilename = Path.Combine(fullBaseFilename, CalculationSubDir);
                     }
@@ -268,7 +268,7 @@
                     }
 
                     string fullBaseFilename = DamProject.ProjectWorkingPath;
-                    if (CalculationSubDir != "")
+                    if (!string.IsNullOrEmpty(CalculationSubDir))
                     {
                         fullBaseFilename = Path.Combine(fullBaseFilename, CalculationSubDir);
                     }
@@ -297,7 +297,7 @@
                 {
                     const string pipingResultFileExtension = ".prxml";
                     string fullFilename = calculationSubDir;
-                    if (calculationSubDir == "")
+                    if (string.IsNullOrEmpty(CalculationSubDir))
                     {
                         fullFilename = DamProject.ProjectWorkingPath;
                         fullFilename = Path.Combine(fullFilename, "Piping");
@@ -2374,6 +2374,7 @@
         }
 
         [Browsable(false)]
+        [XmlIgnore]
         public string CalculationSubDir
         {
             get { return calculationSubDir; }