diff --git a/src/c#/GeneralUpdate.Client/MySample.cs b/src/c#/GeneralUpdate.Client/MySample.cs
index cdd6a1719f4b83126e7023421334e1da4deeca44..26f4fde71c15baef5b22622faa4377729d57c449 100644
--- a/src/c#/GeneralUpdate.Client/MySample.cs
+++ b/src/c#/GeneralUpdate.Client/MySample.cs
@@ -11,6 +11,7 @@ using System.Threading.Tasks;
 using GeneralUpdate.Core.Domain.Enum;
 using GeneralUpdate.Core.Events.CommonArgs;
 using GeneralUpdate.Differential;
+using System.IO;
 
 namespace GeneralUpdate.Client
 {
@@ -225,6 +226,13 @@ namespace GeneralUpdate.Client
             await DifferentialCore.Instance.Clean(path1, path2, path3);
         }
 
+        public async Task TestDifferentialDirty() 
+        {
+            var path1 = "D:\\packet\\source";
+            var path2 = "D:\\packet\\patchs";
+            await DifferentialCore.Instance.Dirty(path1, path2);
+        }
+
         #endregion
     }
 }
diff --git a/src/c#/GeneralUpdate.Client/Program.cs b/src/c#/GeneralUpdate.Client/Program.cs
index f46a15ed9a8c88aeb05e25865c95e1a1262f57cd..3e37065a5e3de04d36fad74784c8b43f663c25d2 100644
--- a/src/c#/GeneralUpdate.Client/Program.cs
+++ b/src/c#/GeneralUpdate.Client/Program.cs
@@ -7,7 +7,8 @@
             Task.Run(async() => 
             {
                 MySample sample = new MySample();
-                await sample.TestDifferentialClean();
+                //await sample.TestDifferentialClean();
+                //await sample.TestDifferentialDirty();
             });
             Console.Read();
         }
diff --git a/src/c#/GeneralUpdate.Differential/ContentProvider/FileProvider.cs b/src/c#/GeneralUpdate.Differential/ContentProvider/FileProvider.cs
index 5f1a5b322d45ba4775c57fe6880191afd1314b61..bf15a96155a8e61a45b36f7dcb763e58d1d32097 100644
--- a/src/c#/GeneralUpdate.Differential/ContentProvider/FileProvider.cs
+++ b/src/c#/GeneralUpdate.Differential/ContentProvider/FileProvider.cs
@@ -48,23 +48,12 @@ namespace GeneralUpdate.Differential.ContentProvider
             {
                 var leftFileNodes = Read(leftPath);
                 var rightFileNodes = Read(rightPath);
-                Dictionary<string, FileNode> dictB = rightFileNodes.ToDictionary(x => x.Name, x => x);
-                List<FileNode> filesOnlyInA = leftFileNodes.Where(f => !dictB.ContainsKey(f.Name)).ToList();
-                return filesOnlyInA;
+                var rightNodeDic = rightFileNodes.ToDictionary(x => x.Name, x => x);
+                var filesOnlyInLeft = leftFileNodes.Where(f => !rightNodeDic.ContainsKey(f.Name)).ToList();
+                return filesOnlyInLeft;
             });
         }
 
-        private void Get(string leftPath, string rightPath)
-        {
-            var leftFileNodes = Directory.GetFiles(leftPath, "*", SearchOption.AllDirectories)
-                                                 .Select(f => f.Substring(leftPath.Length)).ToList();
-
-            var rightFileNodes = Directory.GetFiles(rightPath, "*", SearchOption.AllDirectories)
-                                              .Select(f => f.Substring(rightPath.Length)).ToList();
-
-            leftFileNodes.Except(rightFileNodes).Select(x => leftPath + x).ToList();
-        }
-
         #endregion Public Methods
 
         #region Private Methods
diff --git a/src/c#/GeneralUpdate.Differential/DifferentialCore.cs b/src/c#/GeneralUpdate.Differential/DifferentialCore.cs
index 0ca8dd2d4bd95d8e2c7e932e5422ab3aa314b7ef..44ec20b88fdd91c54dbdc294eb468ba17e7b33a5 100644
--- a/src/c#/GeneralUpdate.Differential/DifferentialCore.cs
+++ b/src/c#/GeneralUpdate.Differential/DifferentialCore.cs
@@ -34,8 +34,6 @@ namespace GeneralUpdate.Differential
         /// </summary>
         private const string DELETE_FILES_NAME = "generalupdate_delete_files.json";
 
-        private Action<object, BaseCompressProgressEventArgs> _compressProgressCallback;
-
         #endregion Private Members
 
         #region Public Properties