/// <summary>Draws the selector line.</summary>
/// <param name="graphics">The specified graphics to draw on.</param>
/// <param name="rectangle">The rectangle.</param>
private void DrawSelectorLine(Graphics graphics, Rectangle rectangle)
{
Rectangle selectorRectangle = GraphicsManager.ApplyAnchor(_selectorAlignment, rectangle, _selectorThickness);
graphics.FillRectangle(new SolidBrush(_tabSelector), selectorRectangle);
}