fix(Duplicate): improve duplicating null child objects

MingboPeng · Sep 22, 2023 · 9e83eaa · 9e83eaa
1 parent 97e2169
commit 9e83eaa
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/Ironbug.HVAC/BaseClass/IB_ModelObject.cs b/src/Ironbug.HVAC/BaseClass/IB_ModelObject.cs
@@ -508,7 +508,7 @@ protected T Duplicate<T>(Func<T> func) where T : IB_ModelObject
             newObj.Children.Clear();
             foreach (var child in this.Children)
             {
-                newObj.Children.Add(child.Duplicate());
+                newObj.Children.Add(child?.Duplicate());
             }
 
             newObj.IBProperties = this.IBProperties.Duplicate();