internal ExcelBorderXml Copy()
        {
            ExcelBorderXml newBorder = new ExcelBorderXml(NameSpaceManager);

            newBorder.Bottom       = _bottom.Copy();
            newBorder.Diagonal     = _diagonal.Copy();
            newBorder.Left         = _left.Copy();
            newBorder.Right        = _right.Copy();
            newBorder.Top          = _top.Copy();
            newBorder.DiagonalUp   = _diagonalUp;
            newBorder.DiagonalDown = _diagonalDown;

            return(newBorder);
        }