diff --git a/Common/CommonTranslatorLib/AbstractOpenXmlMapping.cs b/Common/CommonTranslatorLib/AbstractOpenXmlMapping.cs
index c28f8af5..4d24815a 100644
--- a/Common/CommonTranslatorLib/AbstractOpenXmlMapping.cs
+++ b/Common/CommonTranslatorLib/AbstractOpenXmlMapping.cs
@@ -1,5 +1,5 @@
 using System.Xml;
-
+//添加注释1
 namespace b2xtranslator.CommonTranslatorLib
 {
     public abstract class AbstractOpenXmlMapping
diff --git a/Common/CommonTranslatorLib/BinaryDocument.cs b/Common/CommonTranslatorLib/BinaryDocument.cs
index 006ba940..bd56fb23 100644
--- a/Common/CommonTranslatorLib/BinaryDocument.cs
+++ b/Common/CommonTranslatorLib/BinaryDocument.cs
@@ -1,3 +1,4 @@
+//添加注释2
 namespace b2xtranslator.CommonTranslatorLib
 {
     public abstract class BinaryDocument : IVisitable
diff --git a/Common/CommonTranslatorLib/IMapping.cs b/Common/CommonTranslatorLib/IMapping.cs
index d4217392..287f3181 100644
--- a/Common/CommonTranslatorLib/IMapping.cs
+++ b/Common/CommonTranslatorLib/IMapping.cs
@@ -1,3 +1,4 @@
+////添加注释3
 namespace b2xtranslator.CommonTranslatorLib
 {
     public interface IMapping<T> where T : IVisitable
diff --git a/Common/StructuredStorage/Common/InternalBitConverter.cs b/Common/StructuredStorage/Common/InternalBitConverter.cs
index 4f883799..baaea83c 100644
--- a/Common/StructuredStorage/Common/InternalBitConverter.cs
+++ b/Common/StructuredStorage/Common/InternalBitConverter.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Text;
 
 namespace b2xtranslator.StructuredStorage.Common
@@ -59,9 +60,9 @@ internal string ToString(byte[] value)
 
             var enc = new UnicodeEncoding();            
             string result = enc.GetString(value);
-            if (result.Contains("\0"))
+            if (result.Contains('\0'))
             {
-                result = result.Remove(result.IndexOf("\0"));
+                result = result.Remove(result.IndexOf('\0'));
             }
             return result;
         }