merging xlsx

Jan 24 at 11:19 PM
I have a situation where I have multiple xlsx (e..g 5 xlsx and 1 worksheet on each one) and would like to create a master xlsx with one worksheet by combing all 5 xlsx worksheets into one). I noticed there is an overloading Add(string Name, ExcelWorksheet). However, this is adding a new worksheet instead of appending to the current worksheet.

Is there a way of accomplishing that ?