From 2a6f1df76e098af599a5ee18136237d1e6bb9da2 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Wed, 26 May 2021 23:26:41 +0200
Subject: [PATCH] Fix undo errors in editor on Margin property serialization

---
 Source/Engine/Serialization/JsonConverters.cs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Source/Engine/Serialization/JsonConverters.cs b/Source/Engine/Serialization/JsonConverters.cs
index 2ebf16a79..149bdc241 100644
--- a/Source/Engine/Serialization/JsonConverters.cs
+++ b/Source/Engine/Serialization/JsonConverters.cs
@@ -123,6 +123,13 @@ namespace FlaxEngine.Json
 
             writer.WriteStartObject();
             {
+#if FLAX_EDITOR
+                if ((serializer.TypeNameHandling & TypeNameHandling.Objects) == TypeNameHandling.Objects)
+                {
+                    writer.WritePropertyName("$type");
+                    writer.WriteValue("FlaxEngine.Margin, FlaxEngine.CSharp");
+                }
+#endif
                 writer.WritePropertyName("Left");
                 writer.WriteValue(valueMargin.Left);
                 writer.WritePropertyName("Right");