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