Returns or sets a boolean that represents if this is the first cell in a group of horizontally merged cells. The first cell will contain all the content.

public boolean FirstMerged{ get; set; }
Public Property FirstMerged() As Boolean
 
          //--- Return FirstMerged
          bool merged = cell.FirstMerged;

          //--- Set FirstMerged
          cell.FirstMerged = true;
        
          '--- Return FirstMerged
          Dim merged As Boolean = cell.FirstMerged

          '--- Set FirstMerged
          cell.FirstMerged = True