Index: Riskeer/Integration/src/Riskeer.Integration.Forms/Dialogs/ReferenceLineMetaSelectionDialog.cs
===================================================================
diff -u -r86594ccd7329d320872573a1d066fe18959d3cea -re8719f58b983276cdbb7c57c67bc2e173d73fb10
--- Riskeer/Integration/src/Riskeer.Integration.Forms/Dialogs/ReferenceLineMetaSelectionDialog.cs	(.../ReferenceLineMetaSelectionDialog.cs)	(revision 86594ccd7329d320872573a1d066fe18959d3cea)
+++ Riskeer/Integration/src/Riskeer.Integration.Forms/Dialogs/ReferenceLineMetaSelectionDialog.cs	(.../ReferenceLineMetaSelectionDialog.cs)	(revision e8719f58b983276cdbb7c57c67bc2e173d73fb10)
@@ -210,13 +210,13 @@
                 AssessmentSectionId = referenceLineMeta.AssessmentSectionId;
                 ReferenceLineMeta = referenceLineMeta;
 
-                SignalingValue = GetNormValue(referenceLineMeta.SignalingValue);
+                SignalingValue = TryGetNormValue(referenceLineMeta.SignalingValue);
                 if (SignalingValue != string.Empty)
                 {
                     SignalingReturnPeriod = referenceLineMeta.SignalingValue;
                 }
 
-                LowerLimitValue = GetNormValue(referenceLineMeta.LowerLimitValue);
+                LowerLimitValue = TryGetNormValue(referenceLineMeta.LowerLimitValue);
                 if (LowerLimitValue != string.Empty)
                 {
                     LowerLimitValueReturnPeriod = referenceLineMeta.LowerLimitValue;
@@ -230,7 +230,7 @@
             public int LowerLimitValueReturnPeriod { get; }
             public ReferenceLineMeta ReferenceLineMeta { get; }
 
-            private static string GetNormValue(int? returnPeriod)
+            private static string TryGetNormValue(int? returnPeriod)
             {
                 return returnPeriod.HasValue && returnPeriod > 0
                            ? ProbabilityFormattingHelper.FormatFromReturnPeriod(returnPeriod.Value)