From e92d96bb087e8f739db8b2ccb69b8b1036c50b39 Mon Sep 17 00:00:00 2001
From: VaDiM <vadim.4.ivanov@gmail.com>
Date: Mon, 23 Mar 2026 19:25:30 +0300
Subject: [PATCH] Replace Newtonsoft.Json with System.Text.Json for
 MonoBehaviour assets

---
 AssetStudio/Classes/Object.cs        | 12 ++++++------
 AssetStudioCLI/AssetStudioCLI.csproj |  4 ----
 AssetStudioCLI/Exporter.cs           |  3 +--
 AssetStudioGUI/AssetStudioGUI.csproj |  1 -
 AssetStudioGUI/AssetStudioGUIForm.cs |  3 +--
 AssetStudioGUI/Exporter.cs           |  3 +--
 6 files changed, 9 insertions(+), 17 deletions(-)

diff --git a/AssetStudio/Classes/Object.cs b/AssetStudio/Classes/Object.cs
index 10018a9..bec509a 100644
--- a/AssetStudio/Classes/Object.cs
+++ b/AssetStudio/Classes/Object.cs
@@ -8,6 +8,7 @@ namespace AssetStudio
 {
     public class Object
     {
+        public static readonly JsonSerializerOptions JsonOptions;
         [JsonIgnore]
         public SerializedFile assetsFile;
         [JsonIgnore]
@@ -25,11 +26,10 @@ namespace AssetStudio
         public uint byteSize;
         [JsonIgnore]
         public string Name;
-        private static readonly JsonSerializerOptions jsonOptions;
 
         static Object()
         {
-            jsonOptions = new JsonSerializerOptions
+            JsonOptions = new JsonSerializerOptions
             {
                 Converters = { new JsonConverterHelper.FloatConverter() },
                 Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping,
@@ -72,8 +72,8 @@ namespace AssetStudio
                     m_Mesh.ProcessData();
                 }
 
-                str = JsonSerializer.Deserialize<JsonObject>(JsonSerializer.SerializeToUtf8Bytes(this, GetType(), jsonOptions))
-                    .ToJsonString(jsonOptions).Replace("  ", "    ");
+                str = JsonSerializer.Deserialize<JsonObject>(JsonSerializer.SerializeToUtf8Bytes(this, GetType(), JsonOptions))
+                    .ToJsonString(JsonOptions).Replace("  ", "    ");
             }
             catch
             {
@@ -108,7 +108,7 @@ namespace AssetStudio
             {
                 if (typeDict != null)
                 {
-                    return JsonSerializer.SerializeToDocument(typeDict, jsonOptions);
+                    return JsonSerializer.SerializeToDocument(typeDict, JsonOptions);
                 }
 
                 if (this is Mesh m_Mesh)
@@ -116,7 +116,7 @@ namespace AssetStudio
                     m_Mesh.ProcessData();
                 }
 
-                return JsonSerializer.SerializeToDocument(this, GetType(), jsonOptions);
+                return JsonSerializer.SerializeToDocument(this, GetType(), JsonOptions);
             }
             catch
             {
diff --git a/AssetStudioCLI/AssetStudioCLI.csproj b/AssetStudioCLI/AssetStudioCLI.csproj
index e848d60..08f3d89 100644
--- a/AssetStudioCLI/AssetStudioCLI.csproj
+++ b/AssetStudioCLI/AssetStudioCLI.csproj
@@ -11,10 +11,6 @@
         <DebugType>embedded</DebugType>
     </PropertyGroup>
 
-    <ItemGroup>
-        <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-    </ItemGroup>
-
     <ItemGroup>
         <ProjectReference Include="..\AssetStudioUtility\AssetStudioUtility.csproj" />
         <ProjectReference Include="..\AssetStudio\AssetStudio.csproj" />
diff --git a/AssetStudioCLI/Exporter.cs b/AssetStudioCLI/Exporter.cs
index 90260b1..9ed3f87 100644
--- a/AssetStudioCLI/Exporter.cs
+++ b/AssetStudioCLI/Exporter.cs
@@ -1,6 +1,5 @@
 using AssetStudio;
 using AssetStudioCLI.Options;
-using Newtonsoft.Json;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -143,7 +142,7 @@ namespace AssetStudioCLI
             }
             if (type != null)
             {
-                var str = JsonConvert.SerializeObject(type, Formatting.Indented);
+                var str = System.Text.Json.JsonSerializer.Serialize(type, Object.JsonOptions);
                 File.WriteAllText(exportFullPath, str);
 
                 Logger.Debug($"{item.TypeString} \"{item.Text}\" exported to \"{exportFullPath}\"");
diff --git a/AssetStudioGUI/AssetStudioGUI.csproj b/AssetStudioGUI/AssetStudioGUI.csproj
index a68dae0..1ce458f 100644
--- a/AssetStudioGUI/AssetStudioGUI.csproj
+++ b/AssetStudioGUI/AssetStudioGUI.csproj
@@ -60,7 +60,6 @@
     <ItemGroup>
         <PackageReference Include="Microsoft-WindowsAPICodePack-Core-6.0" Version="1.1.7" />
         <PackageReference Include="Microsoft-WindowsAPICodePack-Shell-6.0" Version="1.1.7" />
-        <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     </ItemGroup>
 
     <ItemGroup Condition=" '$(TargetFramework)' != 'net472' ">
diff --git a/AssetStudioGUI/AssetStudioGUIForm.cs b/AssetStudioGUI/AssetStudioGUIForm.cs
index d32a2f0..1d7e9b7 100644
--- a/AssetStudioGUI/AssetStudioGUIForm.cs
+++ b/AssetStudioGUI/AssetStudioGUIForm.cs
@@ -1,5 +1,4 @@
 using AssetStudio;
-using Newtonsoft.Json;
 using OpenTK.Graphics.OpenGL;
 using System;
 using System.Collections.Generic;
@@ -1259,7 +1258,7 @@ namespace AssetStudioGUI
                 var type = MonoBehaviourToTypeTree(m_MonoBehaviour);
                 obj = m_MonoBehaviour.ToType(type);
             }
-            var str = JsonConvert.SerializeObject(obj, Formatting.Indented);
+            var str = System.Text.Json.JsonSerializer.Serialize(obj, AssetStudio.Object.JsonOptions);
             PreviewText(str);
         }
 
diff --git a/AssetStudioGUI/Exporter.cs b/AssetStudioGUI/Exporter.cs
index 271efe1..a0efbd4 100644
--- a/AssetStudioGUI/Exporter.cs
+++ b/AssetStudioGUI/Exporter.cs
@@ -1,5 +1,4 @@
 using AssetStudio;
-using Newtonsoft.Json;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -121,7 +120,7 @@ namespace AssetStudioGUI
                 var m_Type = Studio.MonoBehaviourToTypeTree(m_MonoBehaviour);
                 type = m_MonoBehaviour.ToType(m_Type);
             }
-            var str = JsonConvert.SerializeObject(type, Formatting.Indented);
+            var str = System.Text.Json.JsonSerializer.Serialize(type, Object.JsonOptions);
             File.WriteAllText(exportFullPath, str);
             return true;
         }