Inserting images in window:

public MainPage()

{

this.InitializeComponent();

}

/// <summary>

/// Invoked when this page is about to be displayed in a Frame.

/// </summary>

/// <param name="e">Event data that describes how this page was reached. The Parameter

/// property is typically used to configure the page.</param>

protected override void OnNavigatedTo(NavigationEventArgs e)

{

}

private async void button1_Click(object sender, RoutedEventArgs e)

{

FileOpenPicker openpicker = new FileOpenPicker();

openpicker.ViewMode = PickerViewMode.Thumbnail;

openpicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;

/// <summary>

/// adding file extensions, as per requirement

openpicker.FileTypeFilter.Add(".jpg");

openpicker.FileTypeFilter.Add(".jpeg");

openpicker.FileTypeFilter.Add(".png");

openpicker.FileTypeFilter.Add(".gif");

openpicker.FileTypeFilter.Add(".tif");

StorageFile file = await openpicker.PickSingleFileAsync();

}