From be577740474095b84bf812c117a766e719cfa115 Mon Sep 17 00:00:00 2001
From: Brian Lagunas <835562+brianlagunas@users.noreply.github.com>
Date: Fri, 23 Aug 2024 10:22:18 -0600
Subject: [PATCH] Fixed KeyTrigger where the Alt key was being seen as
 Key.System

---
 src/Microsoft.Xaml.Behaviors/Input/KeyTrigger.cs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Microsoft.Xaml.Behaviors/Input/KeyTrigger.cs b/src/Microsoft.Xaml.Behaviors/Input/KeyTrigger.cs
index dae0561..094204c 100644
--- a/src/Microsoft.Xaml.Behaviors/Input/KeyTrigger.cs
+++ b/src/Microsoft.Xaml.Behaviors/Input/KeyTrigger.cs
@@ -74,6 +74,12 @@ protected override string GetEventName()
         private void OnKeyPress(object sender, KeyEventArgs e)
         {
             bool isKeyMatch = e.Key == this.Key;
+            // Handle the scenario where the Alt key is pressed (reported as Key.System), allowing the main key to be detected correctly.
+            if (e.Key == Key.System)
+            {
+                // Check if the actual key being held (e.SystemKey) matches the developer-defined key.
+                isKeyMatch = e.SystemKey == this.Key;
+            }
 
             // Get the actual modifiers considering special keys like LeftCtrl, RightCtrl, etc.
             ModifierKeys actualModifiers = GetActualModifiers();