使用using

Common/util/MyWebClient.cs

@@ -142,13 +142,16 @@ namespace OnlineStore.Common
                 LogUtil.debug("HTTP GET FROM: " + url);
                 using (var wc = new MyWebClient { Encoding = encoding })
                 {
-                    var readStream = wc.OpenRead(url);
-                    using (var sr = new StreamReader(readStream, encoding))
+                    using (var readStream = wc.OpenRead(url))
                     {
-                        var result = sr.ReadToEnd();
-                        LogUtil.debug("receive << " + result);
-                        return result;
+                        using (var sr = new StreamReader(readStream, encoding))
+                        {
+                            var result = sr.ReadToEnd();
+                            LogUtil.debug("receive << " + result);
+                            return result;
+                        }
                     }
+
                 }
             }
             catch (Exception e)