From 44d09c79ddd67cd0ab44a37585596bcc87e8677f Mon Sep 17 00:00:00 2001
From: Andrew Barker <abarker@smartertools.com>
Date: Wed, 8 Jan 2020 15:51:14 -0700
Subject: [PATCH] When creating a transition group to the Standard perios, make
 sure that the standard period has been added to the time zone definition.

---
 ComplexProperties/TimeZones/TimeZoneDefinition.cs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ComplexProperties/TimeZones/TimeZoneDefinition.cs b/ComplexProperties/TimeZones/TimeZoneDefinition.cs
index cd1491e2..a1acf7f2 100644
--- a/ComplexProperties/TimeZones/TimeZoneDefinition.cs
+++ b/ComplexProperties/TimeZones/TimeZoneDefinition.cs
@@ -179,6 +179,8 @@ internal TimeZoneDefinition(TimeZoneInfo timeZoneInfo)
                     transitionToDummyGroup.DateTime = lastAdjustmentRuleEndDate.AddDays(1);
 
                     this.transitions.Add(transitionToDummyGroup);
+                    if(!this.periods.ContainsKey(standardPeriod.Id))
+	                    this.periods.Add(standardPeriod.Id, standardPeriod);
                 }
             }
         }