From f07f64dbf43d49d603a04de94d4d77bdc7fd1742 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Thu, 21 Jul 2022 14:49:42 +0200
Subject: [PATCH] Added ContainsKey.

---
 src/Avalonia.Base/Utilities/AvaloniaPropertyDictionary.cs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Avalonia.Base/Utilities/AvaloniaPropertyDictionary.cs b/src/Avalonia.Base/Utilities/AvaloniaPropertyDictionary.cs
index be724bb1b9..92f5d6f2d1 100644
--- a/src/Avalonia.Base/Utilities/AvaloniaPropertyDictionary.cs
+++ b/src/Avalonia.Base/Utilities/AvaloniaPropertyDictionary.cs
@@ -104,6 +104,12 @@ namespace Avalonia.Utilities
             InsertEntry(new Entry(property, value), index);
         }
 
+        /// <summary>
+        /// Determines whether the collection contains the specified key.
+        /// </summary>
+        /// <param name="property">The key.</param>
+        public bool ContainsKey(AvaloniaProperty property) => TryGetEntry(property.Id, out _);
+
         /// <summary>
         /// Gets the key and value at the specified index.
         /// </summary>