diff --git a/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml.cs
index 8800886d..e85a87b6 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml.cs
@@ -67,6 +67,15 @@ namespace CampusAppWP8.Pages.Links
             this.clubLinkFeed.LoadData();
         }
 
+        /// <summary>
+        /// Override the OnNavigatedTo method
+        /// </summary>
+        /// <param name="e">Arguments of navigation</param>
+        protected override void OnNavigatedFrom(NavigationEventArgs e)
+        {
+            this.clubLinkFeed.SaveData();
+            this.commonLinkFeed.SaveData();
+        }
         #endregion
         #region private
 
@@ -114,9 +123,9 @@ namespace CampusAppWP8.Pages.Links
 
             if (this.loadingFeeds < 1)
             {
-                this.ProgressBar.Visibility = System.Windows.Visibility.Collapsed;
+               this.ProgressBar.Visibility = System.Windows.Visibility.Collapsed;
             }
-            this.commonLinkFeed.SaveData();
+
         }
 
         /// <summary>
@@ -129,8 +138,7 @@ namespace CampusAppWP8.Pages.Links
             if (this.loadingFeeds < 1)
             {
                 this.ProgressBar.Visibility = System.Windows.Visibility.Collapsed;
-            }
-            this.clubLinkFeed.SaveData();
+            }            
         }
 
         /// <summary>
diff --git a/CampusAppWP8/CampusAppWP8/Utility/HttpRequest.cs b/CampusAppWP8/CampusAppWP8/Utility/HttpRequest.cs
index ebb30a38..665a004f 100644
--- a/CampusAppWP8/CampusAppWP8/Utility/HttpRequest.cs
+++ b/CampusAppWP8/CampusAppWP8/Utility/HttpRequest.cs
@@ -17,13 +17,12 @@ namespace CampusAppWP8.Utility
     /// </summary>
     public class HttpRequest
     {
-        #region Members
+        #region Member
 
         /// <summary>
-        /// the WebClient, which send the requests
+        /// BaseAddress of the webclient
         /// </summary>
-        private WebClient client;
-
+        private string baseAddress;
         #endregion
 
         #region Constructor
@@ -33,7 +32,6 @@ namespace CampusAppWP8.Utility
         /// </summary>
         public HttpRequest()
         {
-            this.client = new WebClient();
         }
 
         /// <summary>
@@ -42,8 +40,7 @@ namespace CampusAppWP8.Utility
         /// <param name="apiBaseAddress">the url of the HttpRequest base address</param>
         public HttpRequest(Uri apiBaseAddress)
         {
-            this.client = new WebClient();
-            this.client.BaseAddress = apiBaseAddress.AbsoluteUri;
+            baseAddress = apiBaseAddress.AbsoluteUri;
         }
 
         #endregion
@@ -58,8 +55,9 @@ namespace CampusAppWP8.Utility
         /// <param name="action">callback method</param>
         public void HttpGet(Uri url, Action<object, DownloadStringCompletedEventArgs> action)
         {
-            this.client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(action);
-            this.client.DownloadStringAsync(url);
+            WebClient client = new WebClient();
+            client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(action);
+            client.DownloadStringAsync(url);
         }
 
         /// <summary>
@@ -75,7 +73,7 @@ namespace CampusAppWP8.Utility
                 paramterStr += parameter.ToString();
             }
 
-            string getUrlStr = this.client.BaseAddress + "?" + paramterStr;
+            string getUrlStr = baseAddress + "?" + paramterStr;
             return new Uri(getUrlStr, UriKind.Absolute);
         }
 
@@ -190,8 +188,9 @@ namespace CampusAppWP8.Utility
         /// <param name="data">Data which are sending to the HttpRequest</param>
         private void UploadData(Uri url, Action<object, UploadStringCompletedEventArgs> action, string method, string data)
         {
-            this.client.UploadStringCompleted += new UploadStringCompletedEventHandler(action);
-            this.client.UploadStringAsync(url, method, data);
+            WebClient client = new WebClient();
+            client.UploadStringCompleted += new UploadStringCompletedEventHandler(action);
+            client.UploadStringAsync(url, method, data);
         }
         #endregion