private Button[,] CreateButtons(int quantity)
    {
        Form.Rows = quantity;
        Form.Columns = quantity;
        Button[,] buttons = new Button[quantity, quantity];
        for (int i = 0; i < quantity; i++)
        {
            for (int j = 0; j < quantity; j++)
            {
                buttons[i, j] = new Button();
                buttons[i, j].Width = 100;
                buttons[i, j].Height = 20;
                buttons[i, j].Margin = new Thickness(5,80,0,0);
                buttons[i, j].Click += new RoutedEventHandler(new_button_click);
            }
        }
        return buttons;
    }

void new_button_click(object sender, RoutedEventArgs e)
    {
        Button btn = sender as Button;
        if (btn != null)
        {
            var transform = new RotateTransform(90);
            transform.CenterX = 50;
            transform.CenterY = 10;
            btn.RenderTransform = transform;
        }
    }