Using EPPlus Excel - How to ignore excel error checking or remove green tag on top left of the cell

Question

I use EPPlus to export excel 2007 file. The file can export normally but i have some problem with setting column format. My string column with numeric style (Purchase Order

Answer 1

I've solved this problem in much more easier way. E.g. if I define value "123" as object, not a string, then it stores into excel file OK.