代码修改后的版本，全部提交

COSXML/Common/CosClientError.cs

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+using System;
+using System.Collections.Generic;
+
+using System.Text;
+using COSXML.Common;
+using COSXML.Utils;
+/**
+* Copyright (c) 2018 Tencent Cloud. All rights reserved.
+* 11/2/2018 8:19:06 PM
+* bradyxiao
+*/
+namespace COSXML.Common
+{
+    public enum CosClientError
+    {
+        [CosValue("InvalidArgument")]
+        INVALID_ARGUMENT = 10000,
+
+        [CosValue("InvalidCredentials")]
+        INVALID_CREDENTIALS = 10001,
+
+        [CosValue("BadRequest")]
+        BAD_REQUEST = 10002,
+
+        [CosValue("SinkSourceNotFound")]
+        SINK_SOURCE_NOT_FOUND = 10003,
+
+        [CosValue("InternalError")]
+        INTERNA_LERROR = 20000,
+
+        [CosValue("ServerError")]
+        SERVER_ERROR = 20001,
+
+        [CosValue("IOError")]
+        IO_ERROR = 20002,
+
+        [CosValue("PoorNetwork")]
+        POOR_NETWORK = 20003,
+
+        [CosValue("UserCancelled")]
+        USER_CANCELLED = 30000,
+
+        [CosValue("AlreadyFinished")]
+        ALREADY_FINISHED = 30001,
+    }
+}