添加仓库链接

TodoList/Views/MainWindow.xaml

@@ -69,6 +69,7 @@
             <RowDefinition Height="Auto"/> <!-- Toolbar -->
             <RowDefinition Height="Auto"/> <!-- Input -->
             <RowDefinition Height="*"/>    <!-- List -->
+            <RowDefinition Height="Auto"/> <!-- Footer -->
         </Grid.RowDefinitions>
 
         <!-- Header / Toolbar -->
@@ -370,5 +371,14 @@
                 </Grid>
             </Border>
         </Grid>
+
+        <!-- Footer -->
+        <Border Grid.Row="3" Background="#F5F5F7" Padding="15,10" HorizontalAlignment="Center">
+            <TextBlock>
+                <Hyperlink NavigateUri="https://github.com/xinshoushangdao/TodoList" RequestNavigate="Hyperlink_RequestNavigate">
+                    <Run Text="GitHub Repository"/>
+                </Hyperlink>
+            </TextBlock>
+        </Border>
     </Grid>
 </Window>

TodoList/Views/MainWindow.xaml.cs

@@ -1,3 +1,4 @@
+using System.Diagnostics;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
@@ -86,5 +87,10 @@ namespace TodoList.Views
                 vm.OpenEditDialogCommand.Execute(todoItem);
             }
         }
+
+        private void Hyperlink_RequestNavigate(object sender, System.Windows.Navigation.RequestNavigateEventArgs e)
+        {
+            Process.Start(new ProcessStartInfo(e.Uri.AbsoluteUri) { UseShellExecute = true });
+        }
     }
 }