代码修改后的版本，全部提交

COSXML/Transfer/TransferManager.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+/**
+* Copyright (c) 2018 Tencent Cloud. All rights reserved.
+* 11/29/2018 5:09:07 PM
+* bradyxiao
+*/
+namespace COSXML.Transfer
+{
+    public sealed class TransferConfig
+    {
+        internal long divisionForCopy = 5242880; // 5M
+
+        internal long sliceSizeForCopy = 2097152; // 2M
+
+        internal long divisionForUpload = 5242880; // 5M
+
+        internal long sliceSizeForUpload = 1048576; // 1M
+
+
+        public long DdivisionForCopy { get { return divisionForCopy; } set { divisionForCopy = value; } }
+
+        public long DivisionForUpload { get { return divisionForUpload; } set { divisionForUpload = value; } }
+
+        public long SliceSizeForCopy { get { return sliceSizeForCopy; } set { sliceSizeForCopy = value; } }
+
+        public long SliceSizeForUpload { get { return sliceSizeForUpload; } set { sliceSizeForUpload = value; } }
+    }
+
+    public sealed class TransferManager
+    {
+        private TransferConfig transferConfig;
+        private CosXml cosXml;
+       
+        public TransferManager(CosXml cosXmlServer, TransferConfig transferConfig)
+        {
+            if (cosXmlServer == null) throw new ArgumentNullException("CosXmlServer = null");
+            if (transferConfig == null) throw new ArgumentNullException("TransferConfig = null");
+            this.transferConfig = transferConfig;
+            //COSXMLTask.InitCosXmlServer(cosXmlServer);
+            this.cosXml = cosXmlServer;
+        }
+
+        public void Upload(COSXMLUploadTask uploader)
+        {
+            uploader.InitCosXmlServer(cosXml);
+            uploader.SetDivision(transferConfig.divisionForUpload, transferConfig.sliceSizeForUpload);
+            uploader.Upload();
+        }
+
+        public void Download(COSXMLDownloadTask downloader)
+        {
+            downloader.InitCosXmlServer(cosXml);
+            downloader.Download();
+        }
+
+        public void Copy(COSXMLCopyTask copy)
+        {
+            copy.InitCosXmlServer(cosXml);
+            copy.SetDivision(transferConfig.DdivisionForCopy, transferConfig.sliceSizeForCopy);
+            copy.Copy();
+        }
+    }
+}