/// <summary> /// Adds a merged region of cells (hence those cells form one). /// Skips validation.It is possible to create overlapping merged regions /// or create a merged region that intersects a multi-cell array formula /// with this formula, which may result in a corrupt workbook. /// </summary> /// <param name="region">region to merge</param> /// <returns>index of this region</returns> /// <exception cref="System.ArgumentException">if region contains fewer than 2 cells</exception> public int AddMergedRegionUnsafe(CellRangeAddress region) { return(_sh.AddMergedRegionUnsafe(region)); }