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>