public enum BoxHAlign
{
   Left = 0,
   Center = 1,
   Right = 2
}

public class BoxVAlign
{
   Top = 0,
   Middle = 1,
   Bottom = 2
}

   private BoxVAlign valign = BoxVAlign.Top;
   private BoxHAlign halign = BoxHAlign.Left;

   public BoxVAlign VerticalAlign
     {
        get { return valign; }
        set { valign = value; }
     }
   
   public BoxHAlign HorizontalAlign
     {
        get { return halign; }
        set { halign = value; }
     }  

        if(halign == 0)
          {
   
             g.X = x;
             g.Y = y;
             ...
             ...