private void btnRedo_Click(object sender, RoutedEventArgs e)
{
DrawArea.Redo();
if (DrawArea.CanUndo == true)
{
btnUndo.IsEnabled = true;
}
else if (DrawArea.CanUndo == false)
{
btnUndo.IsEnabled = false;
}
if (DrawArea.CanRedo == true)
{
btnRedo.IsEnabled = true;
}
else if (DrawArea.CanRedo == false)
{
btnRedo.IsEnabled = false;
}
}
