1 files changed, 22 insertions, 0 deletions
diff --git a/Xamarin.Forms.Core/CollectionSynchronizationContext.cs b/Xamarin.Forms.Core/CollectionSynchronizationContext.cs
new file mode 100644
index 00000000..a0144260
--- /dev/null
+++ b/Xamarin.Forms.Core/CollectionSynchronizationContext.cs
@@ -0,0 +1,22 @@
+using System;
+
+namespace Xamarin.Forms
+{
+	internal sealed class CollectionSynchronizationContext
+	{
+		internal CollectionSynchronizationContext(object context, CollectionSynchronizationCallback callback)
+		{
+			ContextReference = new WeakReference(context);
+			Callback = callback;
+		}
+
+		internal CollectionSynchronizationCallback Callback { get; private set; }
+
+		internal object Context
+		{
+			get { return ContextReference != null ? ContextReference.Target : null; }
+		}
+
+		internal WeakReference ContextReference { get; }
+	}
+}
+\ No newline at end of file