代码修改后的版本，全部提交

COSXML/Model/Bucket/PutBucketLoggingRequest.cs

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+using COSXML.Common;
+using COSXML.Model.Tag;
+using COSXML.Network;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace COSXML.Model.Bucket
+{
+    public sealed class PutBucketLoggingRequest : BucketRequest
+    {
+        private BucketLoggingStatus bucketLoggingStatus;
+        public PutBucketLoggingRequest(string bucket):base(bucket)
+        {
+            this.method = CosRequestMethod.PUT;
+            this.queryParameters.Add("logging", null);
+            this.bucketLoggingStatus = new BucketLoggingStatus();
+        }
+
+        public void SetTarget(string targetBucket, string targetPrefix)
+        {
+            if (targetPrefix == null && targetPrefix == null) return;
+            if (bucketLoggingStatus.loggingEnabled == null)
+            {
+                bucketLoggingStatus.loggingEnabled = new BucketLoggingStatus.LoggingEnabled();
+            }
+            if(targetBucket != null) bucketLoggingStatus.loggingEnabled.targetBucket = targetBucket;
+            if(targetPrefix != null) bucketLoggingStatus.loggingEnabled.targetPrefix = targetPrefix;
+        }
+
+        public override Network.RequestBody GetRequestBody()
+        {
+            string content = Transfer.XmlBuilder.BuildBucketLogging(bucketLoggingStatus);
+            byte[] data = Encoding.UTF8.GetBytes(content);
+            ByteRequestBody body = new ByteRequestBody(data);
+            return body;
+        }
+    }
+}