Make feed read on error dialog async and preserve selection

Application/FeedErrorWindow.xaml.cs

@@ -105,18 +105,27 @@ namespace FeedCenter
             Close();
         }
 
-        private void HandleRefreshCurrentButtonClick(object sender, RoutedEventArgs e)
+        private async void HandleRefreshCurrentButtonClick(object sender, RoutedEventArgs e)
         {
+            IsEnabled = false;
             Mouse.OverrideCursor = Cursors.Wait;
 
             var feed = (Feed) FeedDataGrid.SelectedItem;
-            feed.Read(_database, true);
+            await feed.ReadAsync(_database, true);
+
+            var selectedIndex = FeedDataGrid.SelectedIndex;
 
             _collectionViewSource.View.Refresh();
 
+            if (selectedIndex >= FeedDataGrid.Items.Count)
+                FeedDataGrid.SelectedIndex = FeedDataGrid.Items.Count - 1;
+            else
+                FeedDataGrid.SelectedIndex = selectedIndex;
+
             SetFeedButtonStates();
 
             Mouse.OverrideCursor = null;
+            IsEnabled = true;
         }
     }
 }

Application/Feeds/Feed.cs

@@ -8,6 +8,7 @@ using System.Linq;
 using System.Net;
 using System.Text;
 using System.Text.RegularExpressions;
+using System.Threading.Tasks;
 
 namespace FeedCenter
 {
@@ -93,6 +94,11 @@ namespace FeedCenter
             return result;
         }
 
+        public async Task<FeedReadResult> ReadAsync(FeedCenterEntities database, bool forceRead = false)
+        {
+            return await Task.Run(() => Read(database, forceRead));
+        }
+
         private Tuple<FeedReadResult, string> RetrieveFeed()
         {
             try
@@ -320,7 +326,7 @@ namespace FeedCenter
                 var lastReadResult = LastReadResult;
 
                 // Build the name of the resource using the enum name and the value
-                var resourceName = $"{typeof (FeedReadResult).Name}_{lastReadResult}";
+                var resourceName = $"{typeof(FeedReadResult).Name}_{lastReadResult}";
 
                 // Try to get the value from the resources
                 var resourceValue = Properties.Resources.ResourceManager.GetString(resourceName);