private void InkCanvas_ManipulationCompleted(object sender, ManipulationCompletedRoutedEventArgs e)
{
if (!selectionStrokesRect.IsEmpty)
{
strokeService.MoveSelectedStrokes(dragStartPosition, e.Position);
}
}
public void ExecuteRedo()
{
strokeService.SelectStrokes(strokes);
strokeService.MoveSelectedStrokes(startPosition, endPosition);
}