Gets or sets whether two cells should be merged.
true if the cells should be merged; otherwise, false.
The cells being merged are identified by the CellMergeEventArgs.Column and CellMergeEventArgs.RowHandle1 and CellMergeEventArgs.RowHandle2 properties. If the cells should be merged, set the Merge property to true. Otherwise, set it to false. The CellMergeEventArgs.Handled parameter must also be set to true to indicate that the current cell merging operation is handled and therefore no default processing is required.