public Thickness(double top, double right, double bottom, double left)
{
if (Script.IsUndefined(top)) { top = 0; }
if (Script.IsUndefined(right)) { right = 0; }
if (Script.IsUndefined(bottom)) { bottom = 0; }
if (Script.IsUndefined(left)) { left = 0; }
this.Top = top;
this.Right = right;
this.Bottom = bottom;
this.Left = left;
}
}