代码修改后的版本，全部提交

COSXML/Model/Object/PutObjectResult.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+
+using System.Text;
+
+namespace COSXML.Model.Object
+{
+    /// <summary>
+    /// 简单上传对象返回的结果
+    /// <see cref="https://cloud.tencent.com/document/product/436/7749"/>
+    /// </summary>
+    public sealed class PutObjectResult : CosResult
+    {
+        /// <summary>
+        /// 对象的eTag
+        /// </summary>
+        public string eTag;
+
+        internal override void InternalParseResponseHeaders()
+        {
+            List<string> values;
+            this.responseHeaders.TryGetValue("ETag", out values);
+            if (values != null && values.Count > 0)
+            {
+                eTag = values[0];
+            }
+        }
+    }
+}