Fix merge error.

`Orientation` was moved to `Avalonia.Layout`.
7 years ago · c99f553c18
1 changed files with 1 additions and 0 deletions
--- a/src/Avalonia.Controls/StackPanel.cs
+++ b/src/Avalonia.Controls/StackPanel.cs
@ -5,6 +5,7 @@

 using System;
 using Avalonia.Input;
+using Avalonia.Layout;

 namespace Avalonia.Controls
 {