diff --git a/CampusAppWP8/CampusAppWP8/CampusAppWP8.csproj b/CampusAppWP8/CampusAppWP8/CampusAppWP8.csproj
index 8a4bfa58..1c76561c 100644
--- a/CampusAppWP8/CampusAppWP8/CampusAppWP8.csproj
+++ b/CampusAppWP8/CampusAppWP8/CampusAppWP8.csproj
@@ -212,6 +212,7 @@
     <Compile Include="Utility\Logger.cs" />
     <Compile Include="Utility\HttpRequest.cs" />
     <Compile Include="Utility\Lui\Button\GoToMapButton.cs" />
+    <Compile Include="Utility\Lui\Button\UpdateButtonAppBar.cs" />
     <Compile Include="Utility\Lui\Button\ToggleButton.cs" />
     <Compile Include="Utility\Lui\Button\NavigateButton.cs" />
     <Compile Include="Utility\Lui\Button\PhoneButton.cs" />
diff --git a/CampusAppWP8/CampusAppWP8/Feed/Link/ClubLinkFeed.cs b/CampusAppWP8/CampusAppWP8/Feed/Link/ClubLinkFeed.cs
index 76f9d279..d6a0b9af 100644
--- a/CampusAppWP8/CampusAppWP8/Feed/Link/ClubLinkFeed.cs
+++ b/CampusAppWP8/CampusAppWP8/Feed/Link/ClubLinkFeed.cs
@@ -12,6 +12,7 @@ namespace CampusAppWP8.Feed.Link
     using CampusAppWP8.Model;
     using CampusAppWP8.Model.Link;
     using CampusAppWP8.Resources;
+    using CampusAppWP8.Utility;
 
     /// <summary>
     /// This Class is for ClubLinkFeeds
@@ -26,8 +27,8 @@ namespace CampusAppWP8.Feed.Link
         public ClubLinkFeed()
             : base(ModelType.FileAndFeed, Constants.FileLink_ClubLinks, Constants.UrlLink_ClubLinks)
         {
-            this.isFileUpToDate += new IsFileUpToDate(this.CheckIsFileUpToDate);
-            this.isModelUpToDate += new IsModelUpToDate(this.CheckIsModelUpToDate);
+            this.isFileUpToDateOnLoad += new IsFileUpToDate(this.CheckIsFileUpToDateOnLoad);
+            this.isModelUpToDateOnLoad += new IsModelUpToDate(this.CheckIsModelUpToDate);
         }
 
         #endregion
@@ -58,7 +59,7 @@ namespace CampusAppWP8.Feed.Link
         /// <param name="model">reference of the FeedModel</param>
         /// <param name="fileInfo">info about the file</param>
         /// <returns>true, if file is up-to-date, otherwise false</returns>
-        private bool CheckIsFileUpToDate(LinkListModel model, FileInfo fileInfo)
+        private bool CheckIsFileUpToDateOnLoad(LinkListModel model, FileInfo fileInfo)
         {
             DateTime lastModified = fileInfo.LastWriteTime;
             return this.CheckIsUpToDate(lastModified);
@@ -71,16 +72,7 @@ namespace CampusAppWP8.Feed.Link
         /// <returns>true, if is up-to-date, otherwise false</returns>
         private bool CheckIsUpToDate(DateTime lastModified)
         {
-            DateTime temp = lastModified.AddDays(1);
-
-            int diff = temp.CompareTo(DateTime.Now);
-
-            if (diff < 0)
-            {
-                return false;
-            }
-
-            return true;
+            return Utilities.DayDifference(Utilities.DifferenceType.Less, lastModified, 7.0);
         }
 
         #endregion
diff --git a/CampusAppWP8/CampusAppWP8/Feed/Link/CommonLinkFeed.cs b/CampusAppWP8/CampusAppWP8/Feed/Link/CommonLinkFeed.cs
index 35c1db36..721c5fc3 100644
--- a/CampusAppWP8/CampusAppWP8/Feed/Link/CommonLinkFeed.cs
+++ b/CampusAppWP8/CampusAppWP8/Feed/Link/CommonLinkFeed.cs
@@ -12,6 +12,7 @@ namespace CampusAppWP8.Feed.Link
     using CampusAppWP8.Model;
     using CampusAppWP8.Model.Link;
     using CampusAppWP8.Resources;
+    using CampusAppWP8.Utility;
 
     /// <summary>
     /// This Class is for CommonLinkFeeds
@@ -26,8 +27,9 @@ namespace CampusAppWP8.Feed.Link
         public CommonLinkFeed()
             : base(ModelType.FileAndFeed, Constants.FileLink_CommonLinks, Constants.UrlLink_CommonLinks)
         {
-            this.isFileUpToDate += new IsFileUpToDate(this.CheckIsFileUpToDate);
-            this.isModelUpToDate += new IsModelUpToDate(this.CheckIsModelUpToDate);
+            this.isFileUpToDateOnLoad += new IsFileUpToDate(this.CheckIsFileUpToDateOnLoad);
+            this.isFileUpToDateOnSave += new IsFileUpToDate(this.CheckIsFileUpToDateOnLoad);
+            this.isModelUpToDateOnLoad += new IsModelUpToDate(this.CheckIsModelUpToDate);
         }
 
         #endregion
@@ -58,7 +60,7 @@ namespace CampusAppWP8.Feed.Link
         /// <param name="model">reference of the FeedModel</param>
         /// <param name="fileInfo">info about the file</param>
         /// <returns>true, if file is up-to-date, otherwise false</returns>
-        private bool CheckIsFileUpToDate(LinkListModel model, FileInfo fileInfo)
+        private bool CheckIsFileUpToDateOnLoad(LinkListModel model, FileInfo fileInfo)
         {
             DateTime lastModified = fileInfo.LastWriteTime;
             return this.CheckIsUpToDate(lastModified);
@@ -71,16 +73,7 @@ namespace CampusAppWP8.Feed.Link
         /// <returns>true, if is up-to-date, otherwise false</returns>
         private bool CheckIsUpToDate(DateTime lastModified)
         {
-            DateTime temp = lastModified.AddDays(1);
-
-            int diff = temp.CompareTo(DateTime.Now);
-
-            if (diff < 0)
-            {
-                return false;
-            }
-
-            return true;
+            return Utilities.DayDifference(Utilities.DifferenceType.Less, lastModified, 7.0);
         }
 
         #endregion
diff --git a/CampusAppWP8/CampusAppWP8/Feed/Mensa/MensaFeed.cs b/CampusAppWP8/CampusAppWP8/Feed/Mensa/MensaFeed.cs
index 265d1aca..9a1a2886 100644
--- a/CampusAppWP8/CampusAppWP8/Feed/Mensa/MensaFeed.cs
+++ b/CampusAppWP8/CampusAppWP8/Feed/Mensa/MensaFeed.cs
@@ -12,6 +12,7 @@ namespace CampusAppWP8.Feed.Mensa
     using CampusAppWP8.Model;
     using CampusAppWP8.Model.Mensa;
     using CampusAppWP8.Resources;
+    using CampusAppWP8.Utility;
 
     /// <summary>
     /// This Class is for MensaFeeds
@@ -26,8 +27,8 @@ namespace CampusAppWP8.Feed.Mensa
         public MensaFeed()
             : base(ModelType.FileAndFeed, Constants.FileMensa_Shedule, Constants.UrlMensa_Week)
         {
-            this.isFileUpToDate += new IsFileUpToDate(this.CheckIsFileUpToDate);
-            this.isModelUpToDate += new IsModelUpToDate(this.CheckIsModelUpToDate);
+            this.isFileUpToDateOnLoad += new IsFileUpToDate(this.CheckIsFileUpToDateOnLoad);
+            this.isModelUpToDateOnLoad += new IsModelUpToDate(this.CheckIsModelUpToDate);
         }
 
         #endregion
@@ -58,7 +59,7 @@ namespace CampusAppWP8.Feed.Mensa
         /// <param name="model">reference of the FeedModel</param>
         /// <param name="fileInfo">info about the file</param>
         /// <returns>true, if file is up-to-date, otherwise false</returns>
-        private bool CheckIsFileUpToDate(MenuWeekModel model, FileInfo fileInfo)
+        private bool CheckIsFileUpToDateOnLoad(MenuWeekModel model, FileInfo fileInfo)
         {
             DateTime lastModified = fileInfo.LastWriteTime;
             return this.CheckIsUpToDate(lastModified);
@@ -81,6 +82,7 @@ namespace CampusAppWP8.Feed.Mensa
             return true;
         }
 
+
         #endregion
 
         #endregion
diff --git a/CampusAppWP8/CampusAppWP8/Feed/StudentCouncil/StudentCouncilFeed.cs b/CampusAppWP8/CampusAppWP8/Feed/StudentCouncil/StudentCouncilFeed.cs
index a2520fc3..caaddd5c 100644
--- a/CampusAppWP8/CampusAppWP8/Feed/StudentCouncil/StudentCouncilFeed.cs
+++ b/CampusAppWP8/CampusAppWP8/Feed/StudentCouncil/StudentCouncilFeed.cs
@@ -12,6 +12,7 @@ namespace CampusAppWP8.Feed.StudentCouncil
     using CampusAppWP8.Model;
     using CampusAppWP8.Model.StudentCouncil;
     using CampusAppWP8.Resources;
+    using CampusAppWP8.Utility;
 
     /// <summary>
     /// This Class is for  StudentCouncilFeed
@@ -26,8 +27,8 @@ namespace CampusAppWP8.Feed.StudentCouncil
         public StudentCouncilFeed()
             : base(ModelType.FileAndFeed, Constants.FileStudentCouncil_StudentCouncils, Constants.UrlStudentCouncil_StudentCouncils)
         {
-            this.isFileUpToDate += new IsFileUpToDate(this.CheckIsFileUpToDate);
-            this.isModelUpToDate += new IsModelUpToDate(this.CheckIsModelUpToDate);
+            this.isFileUpToDateOnLoad += new IsFileUpToDate(this.CheckIsFileUpToDateOnLoad);
+            this.isModelUpToDateOnLoad += new IsModelUpToDate(this.CheckIsModelUpToDate);
         }
 
         #endregion
@@ -58,7 +59,7 @@ namespace CampusAppWP8.Feed.StudentCouncil
         /// <param name="model">reference of the FeedModel</param>
         /// <param name="fileInfo">info about the file</param>
         /// <returns>true, if file is up-to-date, otherwise false</returns>
-        private bool CheckIsFileUpToDate(StudentCouncilListModel model, FileInfo fileInfo)
+        private bool CheckIsFileUpToDateOnLoad(StudentCouncilListModel model, FileInfo fileInfo)
         {
             DateTime lastModified = fileInfo.LastWriteTime;
             return this.CheckIsUpToDate(lastModified);
@@ -71,16 +72,7 @@ namespace CampusAppWP8.Feed.StudentCouncil
         /// <returns>true, if is up-to-date, otherwise false</returns>
         private bool CheckIsUpToDate(DateTime lastModified)
         {
-            DateTime temp = lastModified.AddDays(1);
-
-            int diff = temp.CompareTo(DateTime.Now);
-
-            if (diff < 0)
-            {
-                return false;
-            }
-
-            return true;
+            return Utilities.DayDifference(Utilities.DifferenceType.Less, lastModified, 7.0);
         }
 
         #endregion
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Departments/DepartmentIndexPage.xaml b/CampusAppWP8/CampusAppWP8/Pages/Departments/DepartmentIndexPage.xaml
index 7cf96e78..8c1c6225 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Departments/DepartmentIndexPage.xaml
+++ b/CampusAppWP8/CampusAppWP8/Pages/Departments/DepartmentIndexPage.xaml
@@ -6,6 +6,7 @@
     xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:lui="clr-namespace:CampusAppWP8.Utility.Lui.Button"
     FontFamily="{StaticResource PhoneFontFamilyNormal}"
     FontSize="{StaticResource PhoneFontSizeNormal}"
     Foreground="{StaticResource PhoneForegroundBrush}"
@@ -74,4 +75,9 @@
             </ListBox.ItemTemplate>
         </ListBox>
     </Grid>
+    <phone:PhoneApplicationPage.ApplicationBar>
+        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="False" Mode="Minimized"  Opacity="1.0" >
+            <lui:UpdateButtonAppBar Click="DeptForceUpdate_Click"/>
+        </shell:ApplicationBar>
+    </phone:PhoneApplicationPage.ApplicationBar>
 </phone:PhoneApplicationPage>
\ No newline at end of file
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Departments/DepartmentIndexPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Departments/DepartmentIndexPage.xaml.cs
index 9c048b81..eab525bb 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Departments/DepartmentIndexPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Departments/DepartmentIndexPage.xaml.cs
@@ -156,5 +156,16 @@ namespace CampusAppWP8.Pages.Departments
 
             NavigationService.Navigate(new Uri(Constants.PathDepartment_DepartmentPage + "?pivotindex=" + tempElem.Tag, UriKind.Relative));
         }
+
+        /// <summary>
+        /// On clicking the update button in the ApplicationBar.
+        /// Force a data update from the web.
+        /// </summary>
+        /// <param name="sender">button object</param>
+        /// <param name="e">event args</param>
+        private void DeptForceUpdate_Click(object sender, EventArgs e)
+        {
+            DepartmentIndexPage.feed.ForceWebUpdate();
+        }
     }
 }
\ No newline at end of file
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml b/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml
index f0378ecc..0057ec4c 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml
+++ b/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml
@@ -58,5 +58,9 @@
             </phone:PivotItem>
         </phone:Pivot>
     </Grid>
-
+    <phone:PhoneApplicationPage.ApplicationBar>
+        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="False" Mode="Minimized"  Opacity="1.0" >
+            <lui:UpdateButtonAppBar Click="LinkForceUpdate_Click"/>
+        </shell:ApplicationBar>
+    </phone:PhoneApplicationPage.ApplicationBar>
 </phone:PhoneApplicationPage>
\ No newline at end of file
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml.cs
index f0ccccaa..e85a87b6 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml.cs
@@ -10,6 +10,7 @@ namespace CampusAppWP8.Pages.Links
     using System.Windows.Navigation;
     using CampusAppWP8.Feed.Link;
     using Microsoft.Phone.Controls;
+    using System;
 
     /// <summary>
     /// Class for the LinkPage
@@ -66,6 +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
 
@@ -113,8 +123,9 @@ namespace CampusAppWP8.Pages.Links
 
             if (this.loadingFeeds < 1)
             {
-                this.ProgressBar.Visibility = System.Windows.Visibility.Collapsed;
+               this.ProgressBar.Visibility = System.Windows.Visibility.Collapsed;
             }
+
         }
 
         /// <summary>
@@ -127,7 +138,7 @@ namespace CampusAppWP8.Pages.Links
             if (this.loadingFeeds < 1)
             {
                 this.ProgressBar.Visibility = System.Windows.Visibility.Collapsed;
-            }
+            }            
         }
 
         /// <summary>
@@ -146,6 +157,19 @@ namespace CampusAppWP8.Pages.Links
             this.ClubLinkPanel.ItemsSource = this.clubLinkFeed.Model.Links;
         }
 
+        /// <summary>
+        /// On clicking the update button in the ApplicationBar.
+        /// Force a data update from the web.
+        /// </summary>
+        /// <param name="sender">button object</param>
+        /// <param name="e">event args</param>
+        private void LinkForceUpdate_Click(object sender, EventArgs e)
+        {
+            this.loadingFeeds = 2;
+            this.ProgressBar.Visibility = System.Windows.Visibility.Visible;
+            this.commonLinkFeed.ForceWebUpdate();
+            this.clubLinkFeed.ForceWebUpdate();
+        }
         #endregion
 
         #endregion
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml b/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml
index aed38723..712adcde 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml
+++ b/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml
@@ -6,6 +6,7 @@
     xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:lui="clr-namespace:CampusAppWP8.Utility.Lui.Button"
     mc:Ignorable="d"
     FontFamily="{StaticResource PhoneFontFamilyNormal}"
     FontSize="{StaticResource PhoneFontSizeNormal}"
@@ -137,4 +138,9 @@
         </phone:Pivot>
         <!-- <Image Source="/Assets/AlignmentGrid.png" VerticalAlignment="Top" Height="800" Width="480" Margin="0,-32,0,0" Grid.Row="0" Grid.RowSpan="2" IsHitTestVisible="False" /> -->
     </Grid>
+    <phone:PhoneApplicationPage.ApplicationBar>
+        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="False" Mode="Minimized"  Opacity="1.0" >
+            <lui:UpdateButtonAppBar Click="MensaForceUpdate_Click"/>
+        </shell:ApplicationBar>
+    </phone:PhoneApplicationPage.ApplicationBar>
 </phone:PhoneApplicationPage>
\ No newline at end of file
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml.cs
index 8b531f1b..cc42ef95 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml.cs
@@ -88,6 +88,7 @@ namespace CampusAppWP8.Pages.Mensa
         {
             this.SetupMensaPivot();
             this.ProgressBar.Visibility = System.Windows.Visibility.Collapsed;
+            this.feed.SaveData();
         }
 
         /// <summary>
@@ -130,7 +131,21 @@ namespace CampusAppWP8.Pages.Mensa
 
             this.selectedIndex = todayIndex;
         }
+
+        /// <summary>
+        /// On clicking the update button in the ApplicationBar.
+        /// Force a data update from the web.
+        /// </summary>
+        /// <param name="sender">button object</param>
+        /// <param name="e">event args</param>
+        private void MensaForceUpdate_Click(object sender, EventArgs e)
+        {
+            this.ProgressBar.Visibility = System.Windows.Visibility.Visible;
+            this.feed.ForceWebUpdate();
+        }
+
         #endregion
+
         #endregion
     }
 }
\ No newline at end of file
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml b/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml
index 40dce836..32570e7c 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml
+++ b/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml
@@ -126,5 +126,9 @@
             </ListBox.ItemTemplate>
         </ListBox>
     </Grid>
-
+    <phone:PhoneApplicationPage.ApplicationBar>
+        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="False" Mode="Minimized"  Opacity="1.0" >
+            <lui:UpdateButtonAppBar Click="OpenHoursForceUpdate_Click"/>
+        </shell:ApplicationBar>
+    </phone:PhoneApplicationPage.ApplicationBar>
 </phone:PhoneApplicationPage>
\ No newline at end of file
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml.cs
index 7d484a9b..b8c56c47 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml.cs
@@ -10,6 +10,7 @@ namespace CampusAppWP8.Pages.Openinghours
     using System.Windows.Navigation;
     using CampusAppWP8.Feed.Openinghours;
     using Microsoft.Phone.Controls;
+    using System;
 
     /// <summary>
     /// Opening hours page.
@@ -83,6 +84,7 @@ namespace CampusAppWP8.Pages.Openinghours
         {
             this.SetupInstitutionList();
             this.ProgressBar.Visibility = System.Windows.Visibility.Collapsed;
+            this.feed.SaveData();
         }
 
         /// <summary>
@@ -93,6 +95,17 @@ namespace CampusAppWP8.Pages.Openinghours
             this.InstitutionPanel.ItemsSource = this.feed.Model.Institutions;
         }
 
+        /// <summary>
+        /// On clicking the update button in the ApplicationBar.
+        /// Force a data update from the web.
+        /// </summary>
+        /// <param name="sender">button object</param>
+        /// <param name="e">event args</param>
+        private void OpenHoursForceUpdate_Click(object sender, EventArgs e)
+        {
+            this.ProgressBar.Visibility = System.Windows.Visibility.Visible;
+            this.feed.ForceWebUpdate();
+        }
         // private
         #endregion
         // Method
diff --git a/CampusAppWP8/CampusAppWP8/Pages/StudentCouncil/StudentCouncilPage.xaml b/CampusAppWP8/CampusAppWP8/Pages/StudentCouncil/StudentCouncilPage.xaml
index 6be59cd1..f4f7b52c 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/StudentCouncil/StudentCouncilPage.xaml
+++ b/CampusAppWP8/CampusAppWP8/Pages/StudentCouncil/StudentCouncilPage.xaml
@@ -52,5 +52,9 @@
             </phone:Pivot.ItemTemplate>
         </phone:Pivot>
     </Grid>
-
+    <phone:PhoneApplicationPage.ApplicationBar>
+        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="False" Mode="Minimized"  Opacity="1.0" >
+            <lui:UpdateButtonAppBar Click="StudentForceUpdate_Click"/>
+        </shell:ApplicationBar>
+    </phone:PhoneApplicationPage.ApplicationBar>
 </phone:PhoneApplicationPage>
\ No newline at end of file
diff --git a/CampusAppWP8/CampusAppWP8/Pages/StudentCouncil/StudentCouncilPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/StudentCouncil/StudentCouncilPage.xaml.cs
index fa36d6a6..486d4611 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/StudentCouncil/StudentCouncilPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/StudentCouncil/StudentCouncilPage.xaml.cs
@@ -10,6 +10,7 @@ namespace CampusAppWP8.Pages.StudentCouncil
     using System.Windows.Navigation;
     using Microsoft.Phone.Controls;
     using CampusAppWP8.Feed.StudentCouncil;
+    using System;
 
     /// <summary>
     /// Class for the  StudentCouncilPage
@@ -77,6 +78,7 @@ namespace CampusAppWP8.Pages.StudentCouncil
         {
             this.SetupStudentCouncilPivot();
             this.ProgressBar.Visibility = System.Windows.Visibility.Collapsed;
+            this.feed.SaveData();
         }
 
         /// <summary>
@@ -87,6 +89,18 @@ namespace CampusAppWP8.Pages.StudentCouncil
             this.StudentCouncilPivot.ItemsSource = this.feed.Model.GetStudentCouncilsGroupByFaculty();
         }
 
+        /// <summary>
+        /// On clicking the update button in the ApplicationBar.
+        /// Force a data update from the web.
+        /// </summary>
+        /// <param name="sender">button object</param>
+        /// <param name="e">event args</param>
+        private void StudentForceUpdate_Click(object sender, EventArgs e)
+        {
+            this.ProgressBar.Visibility = System.Windows.Visibility.Visible;
+            this.feed.ForceWebUpdate();
+        }
+
         #endregion
 
         #endregion
diff --git a/CampusAppWP8/CampusAppWP8/Utility/File.cs b/CampusAppWP8/CampusAppWP8/Utility/File.cs
index 8e6fcae3..b3e51dc0 100644
--- a/CampusAppWP8/CampusAppWP8/Utility/File.cs
+++ b/CampusAppWP8/CampusAppWP8/Utility/File.cs
@@ -220,11 +220,19 @@ namespace CampusAppWP8.Utility
         /// <param name="data">data array</param>
         private async void WriteAsync(byte[] data)
         {
-            var file = await File.LocalFolder.CreateFileAsync(this.filename, CreationCollisionOption.ReplaceExisting);
-
-            using (var s = await file.OpenStreamForWriteAsync())
+            try
             {
-                await s.WriteAsync(data, 0, data.Length);
+                var file = await File.LocalFolder.CreateFileAsync(this.filename, CreationCollisionOption.ReplaceExisting);
+
+                using (var s = await file.OpenStreamForWriteAsync())
+                {
+                    await s.WriteAsync(data, 0, data.Length);
+                }
+            }
+            catch (Exception e)
+            {
+                // log write Error
+                Logger.LogException(e);
             }
         }
     }
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
 
diff --git a/CampusAppWP8/CampusAppWP8/Utility/Lui/Button/UpdateButtonAppBar.cs b/CampusAppWP8/CampusAppWP8/Utility/Lui/Button/UpdateButtonAppBar.cs
new file mode 100644
index 00000000..36472d6a
--- /dev/null
+++ b/CampusAppWP8/CampusAppWP8/Utility/Lui/Button/UpdateButtonAppBar.cs
@@ -0,0 +1,48 @@
+//-----------------------------------------------------------------------
+// <copyright file="UpdateButtonAppBar.cs" company="BTU/IIT">
+//     Company copyright tag.
+// </copyright>
+// <author>stubbfel</author>
+// <sience>22.07.2013</sience>
+//----------------------------------------------------------------------
+namespace CampusAppWP8.Utility.Lui.Button
+{
+    using System;
+    using System.Windows;
+    using CampusAppWP8.Resources;
+    using Microsoft.Phone.Shell;
+
+    /// <summary>
+    /// This class create an Button which start the Email-Client
+    /// </summary>
+    public class UpdateButtonAppBar : ApplicationBarIconButton
+    {
+        #region Members
+
+        /// <summary>
+        /// IconUri of the Button
+        /// </summary>
+        private static Uri iconUri = new Uri(Icons.Update, UriKind.Relative);
+
+        /// <summary>
+        /// Text of the Button
+        /// </summary>
+        private static string text = AppResources.UpdateBtn;
+
+        #endregion
+
+        #region Constructors
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="UpdateButtonAppBar" /> class.
+        /// </summary>
+        public UpdateButtonAppBar()
+            : base()
+        {
+            this.IconUri = UpdateButtonAppBar.iconUri;
+            this.Text = UpdateButtonAppBar.text;
+        }
+
+        #endregion
+    }
+}