代码修改后的版本，全部提交

COSXML/Model/Object/CompleteMultipartUploadResult.cs

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+using System;
+using System.Collections.Generic;
+
+using System.Text;
+using COSXML.Model.Tag;
+using COSXML.Transfer;
+
+namespace COSXML.Model.Object
+{
+    /// <summary>
+    /// 完成整个分块上传返回的结果
+    /// <see cref="https://cloud.tencent.com/document/product/436/7742"/>
+    /// </summary>
+    public sealed class CompleteMultipartUploadResult : CosResult
+    {
+        /// <summary>
+        /// Complete返回信息
+        /// <see cref="Model.Tag.CompleteResult"/>
+        /// </summary>
+        public CompleteResult completeResult;
+
+        internal override void ParseResponseBody(System.IO.Stream inputStream, string contentType, long contentLength)
+        {
+            completeResult = new CompleteResult();
+            XmlParse.ParseCompleteMultipartUploadResult(inputStream, completeResult);
+        }
+
+        public override string GetResultInfo()
+        {
+            return base.GetResultInfo() + (completeResult == null ? "" : "\n" + completeResult.GetInfo());
+        }
+    }
+}