epplus Merge Cells Merging cells
Example
//By range address
worksheet.Cells["A1:B5"].Merge = true;
//By indexes
worksheet.Cells[1,1,5,2].Merge = true;
//By range address
worksheet.Cells["A1:B5"].Merge = true;
//By indexes
worksheet.Cells[1,1,5,2].Merge = true;
