From d34d6372f1e5216dbbdc55a797555187b6d6de8a Mon Sep 17 00:00:00 2001
From: LalithaNadimpalli <lalli.nadimpalli@gmail.com>
Date: Wed, 7 Sep 2022 11:10:27 -0700
Subject: [PATCH] AttachedDropShadowCrashFix

Adding a null reference check to AttachedDropShadow crash issue
---
 Microsoft.Toolkit.Uwp.UI/Shadows/AttachedShadowBase.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Microsoft.Toolkit.Uwp.UI/Shadows/AttachedShadowBase.cs b/Microsoft.Toolkit.Uwp.UI/Shadows/AttachedShadowBase.cs
index b78e2a771fc..dccd84e2121 100644
--- a/Microsoft.Toolkit.Uwp.UI/Shadows/AttachedShadowBase.cs
+++ b/Microsoft.Toolkit.Uwp.UI/Shadows/AttachedShadowBase.cs
@@ -174,9 +174,12 @@ public AttachedShadowElementContext GetElementContext(FrameworkElement element)
         /// <inheritdoc/>
         public IEnumerable<AttachedShadowElementContext> EnumerateElementContexts()
         {
-            foreach (var kvp in ShadowElementContextTable)
+            if (ShadowElementContextTable != null)
             {
-                yield return kvp.Value;
+                foreach (var kvp in ShadowElementContextTable)
+                {
+                    yield return kvp.Value;
+                }
             }
         }