C#ImageSourceChange.cs

 private async void LoadImage_Click_1(object sender, RoutedEventArgs e)
        {
            StorageFile file = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Image/Tulips.jpg"));
            using (IRandomAccessStream fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read))
            {
                BitmapImage image = new BitmapImage();
                image.SetSource(fileStream);
                Scenario4Image.Source = image;
            }    
        }