text: public static bool Contains(CellRangeAddress crA, CellRangeAddress crB){int firstRow = crB.FirstRow;int lastRow = crB.LastRow;int firstCol = crB.FirstColumn;int lastCol = crB.LastColumn;return le(crA.FirstRow, firstRow) && ge(crA.LastRow, lastRow)&& le(crA.FirstColumn, firstCol) && ge(crA.LastColumn, lastCol);}