Update threading code to match article (#6277)

Author: adegeo

wpf/Threading/Weather/net48/csharp/Code.zip

@@ -20,7 +20,7 @@ private async void FetchButton_Click(object sender, RoutedEventArgs e)
             ((Storyboard)Resources["HideWeatherImageStoryboard"]).Begin(this);
 
             // Asynchronously fetch the weather forecast on a different thread and pause this code.
-            string weather = await FetchWeatherFromServerAsync();
+            string weather = await Task.Run(FetchWeatherFromServerAsync);
 
             // After async data returns, process it...
             // Set the weather image

wpf/Threading/Weather/net48/csharp/Weather.xaml.cs

@@ -11,14 +11,14 @@ Public Class Weather
         DirectCast(Resources("HideWeatherImageStoryboard"), Storyboard).Begin(Me)
 
         ' Asynchronously fetch the weather forecast on a different thread and pause this code.
-        Dim Weather As String = Await FetchWeatherFromServerAsync()
+        Dim weatherType As String = Await Task.Run(AddressOf FetchWeatherFromServerAsync)
 
         ' After async data returns, process it...
         ' Set the weather image
-        If Weather = "sunny" Then
+        If weatherType = "sunny" Then
             weatherIndicatorImage.Source = DirectCast(Resources("SunnyImageSource"), ImageSource)
 
-        ElseIf Weather = "rainy" Then
+        ElseIf weatherType = "rainy" Then
             weatherIndicatorImage.Source = DirectCast(Resources("RainingImageSource"), ImageSource)
 
         End If
@@ -30,7 +30,7 @@ Public Class Weather
         ' Update UI text
         fetchButton.IsEnabled = True
         fetchButton.Content = "Fetch Forecast"
-        weatherText.Text = Weather
+        weatherText.Text = weatherType
     End Sub
 
     Private Async Function FetchWeatherFromServerAsync() As Task(Of String)