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Gets or sets the auto merge mode.
AutoMergeMode Mode { get; set; }
Property Mode As AutoMergeMode
worksheet.AutoMerge(worksheet.Range["A1:A4"], AutoMergeDirection.Column);
IAutoMergeRangeInfo mergeInfo = worksheet.AutoMergeRangesInfo[0];
mergeInfo.Mode = AutoMergeMode.Free;
AutoMergeMode mode = mergeInfo.Mode;