diff --git a/Editor/ABI/TypeCreatorBase.cs b/Editor/ABI/TypeCreatorBase.cs
index 54b3ffd..9c98490 100644
--- a/Editor/ABI/TypeCreatorBase.cs
+++ b/Editor/ABI/TypeCreatorBase.cs
@@ -5,6 +5,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using UnityEngine;
 
 namespace HybridCLR.Editor.ABI
 {
@@ -74,6 +75,10 @@ namespace HybridCLR.Editor.ABI
                 case ElementType.ValueType:
                 {
                     TypeDef typeDef = type.ToTypeDefOrRef().ResolveTypeDef();
+                    if (typeDef == null)
+                    {
+                        throw new Exception($"type:{type} 未能找到定义。请尝试 `HybridCLR/Genergate/LinkXml`，然后Build一次生成AOT dll，再重新生成桥接函数");
+                    }
                     if (typeDef.IsEnum)
                     {
                         return CreateTypeInfo(typeDef.GetEnumUnderlyingType());
diff --git a/Editor/ABI/ValueTypeSizeAligmentCalculator.cs b/Editor/ABI/ValueTypeSizeAligmentCalculator.cs
index 5162271..a97dd02 100644
--- a/Editor/ABI/ValueTypeSizeAligmentCalculator.cs
+++ b/Editor/ABI/ValueTypeSizeAligmentCalculator.cs
@@ -74,11 +74,11 @@ namespace HybridCLR.Editor.ABI
 				{
 					continue;
 				}
-				if (sa != null && typeDef.Layout.HasFlag(dnlib.DotNet.TypeAttributes.ExplicitLayout))
+				if (typeDef.Layout.HasFlag(dnlib.DotNet.TypeAttributes.ExplicitLayout))
 				{
 					int offset = (int)field.FieldOffset.Value;
 					totalSize = Math.Max(totalSize, offset + fs);
-					if (offset > sa.ClassSize)
+					if (sa != null && offset > sa.ClassSize)
 					{
 						useSLSize = false;
 					}
@@ -90,7 +90,7 @@ namespace HybridCLR.Editor.ABI
 						totalSize = (totalSize + fa - 1) / fa * fa;
 					}
 					totalSize += fs;
-					if (sa != null && typeDef.Layout.HasFlag(dnlib.DotNet.TypeAttributes.SequentialLayout) && totalSize > sa.ClassSize)
+					if (sa != null && totalSize > sa.ClassSize)
                     {
 						useSLSize = false;
                     }
diff --git a/package.json b/package.json
index 029349b..2ad77f6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "com.focus-creative-games.hybridclr_unity",
-  "version": "1.1.12",
+  "version": "1.1.13",
   "displayName": "HybridCLR",
   "description": "Unity package for HybridCLR. It includes editor and runtime scripts and assets for HybridCLR",
   "category": "Runtime",