/// <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));
}
