private void 罫線を消す_Click(object sender, RibbonControlEventArgs e)
        {
            //選択範囲の取得
            Range selection = (Range)Globals.ThisAddIn.Application.Selection;
            //選択範囲の数
            int count = selection.Areas.Count;
            //複数選択範囲を配列に入れる
            Range[] allRange = new Range[count];
            //それぞれの選択範囲について繰り返す
            foreach (Range r in selection.Areas)
            {
                //上端罫線を消す
                r.Borders.get_Item(XlBordersIndex.xlEdgeTop).LineStyle = XlLineStyle.xlLineStyleNone;
                //下端罫線を消す
                r.Borders.get_Item(XlBordersIndex.xlEdgeBottom).LineStyle = XlLineStyle.xlLineStyleNone;
                //左端罫線を消す
                r.Borders.get_Item(XlBordersIndex.xlEdgeLeft).LineStyle = XlLineStyle.xlLineStyleNone;
                //右端罫線を消す
                r.Borders.get_Item(XlBordersIndex.xlEdgeRight).LineStyle = XlLineStyle.xlLineStyleNone;
                //内部横罫線を消す
                r.Borders.get_Item(XlBordersIndex.xlInsideHorizontal).LineStyle = XlLineStyle.xlLineStyleNone;
                //内部縦罫線を消す
                r.Borders.get_Item(XlBordersIndex.xlInsideVertical).LineStyle = XlLineStyle.xlLineStyleNone;
                //右上り罫線を消す
                r.Borders.get_Item(XlBordersIndex.xlDiagonalUp).LineStyle = XlLineStyle.xlLineStyleNone;
                //右下がり罫線を消す
                r.Borders.get_Item(XlBordersIndex.xlDiagonalDown).LineStyle = XlLineStyle.xlLineStyleNone;
            }
        }