diff --git a/Data~/Templates/AssemblyManifest.cpp.tpl b/Data~/Templates/AssemblyManifest.cpp.tpl
new file mode 100644
index 0000000..d43977d
--- /dev/null
+++ b/Data~/Templates/AssemblyManifest.cpp.tpl
@@ -0,0 +1,12 @@
+#include "../Il2CppCompatibleDef.h"
+
+namespace hybridclr
+{
+	const char* g_placeHolderAssemblies[] =
+	{
+		//!!!{{PLACE_HOLDER
+
+		//!!!}}PLACE_HOLDER
+		nullptr,
+	};
+}
diff --git a/Data~/Templates/UnityVersion.h.tpl b/Data~/Templates/UnityVersion.h.tpl
new file mode 100644
index 0000000..f0fddb8
--- /dev/null
+++ b/Data~/Templates/UnityVersion.h.tpl
@@ -0,0 +1,6 @@
+#pragma once
+
+//!!!{{UNITY_VERSION
+
+
+//!!!}}UNITY_VERSION
\ No newline at end of file
diff --git a/Editor/Commands/Il2CppDefGeneratorCommand.cs b/Editor/Commands/Il2CppDefGeneratorCommand.cs
index a4228c5..66efc69 100644
--- a/Editor/Commands/Il2CppDefGeneratorCommand.cs
+++ b/Editor/Commands/Il2CppDefGeneratorCommand.cs
@@ -20,8 +20,10 @@ namespace HybridCLR.Editor.Commands
             {
                 UnityVersion = Application.unityVersion,
                 HotUpdateAssemblies = SettingsUtil.HotUpdateAssemblyNamesIncludePreserved,
-                OutputFile = $"{SettingsUtil.LocalIl2CppDir}/libil2cpp/hybridclr/generated/UnityVersion.h",
-                OutputFile2 = $"{SettingsUtil.LocalIl2CppDir}/libil2cpp/hybridclr/generated/AssemblyManifest.cpp",
+                UnityVersionTemplateFile = $"{SettingsUtil.TemplatePathInPackage}/UnityVersion.h.tpl",
+                UnityVersionOutputFile = $"{SettingsUtil.LocalIl2CppDir}/libil2cpp/hybridclr/generated/UnityVersion.h",
+                AssemblyManifestTemplateFile = $"{SettingsUtil.TemplatePathInPackage}/AssemblyManifest.cpp.tpl",
+                AssemblyManifestOutputFile = $"{SettingsUtil.LocalIl2CppDir}/libil2cpp/hybridclr/generated/AssemblyManifest.cpp",
                 EnableProfilerInReleaseBuild = HybridCLRSettings.Instance.enableProfilerInReleaseBuild,
                 EnableStraceTraceInWebGLReleaseBuild = HybridCLRSettings.Instance.enableStraceTraceInWebGLReleaseBuild,
             };
diff --git a/Editor/Il2CppDef/Il2CppDefGenerator.cs b/Editor/Il2CppDef/Il2CppDefGenerator.cs
index 1bee8da..db792f4 100644
--- a/Editor/Il2CppDef/Il2CppDefGenerator.cs
+++ b/Editor/Il2CppDef/Il2CppDefGenerator.cs
@@ -17,9 +17,13 @@ namespace HybridCLR.Editor.Il2CppDef
         {
             public List<string> HotUpdateAssemblies { get; set; }
 
-            public string OutputFile { get; set; }
+            public string UnityVersionTemplateFile { get; set; }
 
-            public string OutputFile2 { get; set; }
+            public string UnityVersionOutputFile { get; set; }
+
+            public string AssemblyManifestTemplateFile { get; set; }
+
+            public string AssemblyManifestOutputFile { get; set; }
 
             public string UnityVersion { get; set; }
 
@@ -45,7 +49,7 @@ namespace HybridCLR.Editor.Il2CppDef
 
         private void GenerateIl2CppConfig()
         {
-            var frr = new FileRegionReplace(File.ReadAllText(_options.OutputFile));
+            var frr = new FileRegionReplace(File.ReadAllText(_options.UnityVersionTemplateFile));
 
             List<string> lines = new List<string>();
 
@@ -93,13 +97,13 @@ namespace HybridCLR.Editor.Il2CppDef
 
             frr.Replace("UNITY_VERSION", string.Join("\n", lines));
 
-            frr.Commit(_options.OutputFile);
-            Debug.Log($"[HybridCLR.Editor.Il2CppDef.Generator] output:{_options.OutputFile}");
+            frr.Commit(_options.UnityVersionOutputFile);
+            Debug.Log($"[HybridCLR.Editor.Il2CppDef.Generator] output:{_options.UnityVersionOutputFile}");
         }
 
         private void GeneratePlaceHolderAssemblies()
         {
-            var frr = new FileRegionReplace(File.ReadAllText(_options.OutputFile2));
+            var frr = new FileRegionReplace(File.ReadAllText(_options.AssemblyManifestTemplateFile));
 
             List<string> lines = new List<string>();
 
@@ -110,8 +114,8 @@ namespace HybridCLR.Editor.Il2CppDef
 
             frr.Replace("PLACE_HOLDER", string.Join("\n", lines));
 
-            frr.Commit(_options.OutputFile2);
-            Debug.Log($"[HybridCLR.Editor.Il2CppDef.Generator] output:{_options.OutputFile2}");
+            frr.Commit(_options.AssemblyManifestOutputFile);
+            Debug.Log($"[HybridCLR.Editor.Il2CppDef.Generator] output:{_options.AssemblyManifestOutputFile}");
         }
     }
 }