Applied formula on excel removed after adding a new row in excel


When i am adding a new row and inserting data dynamically, data inserted successfully but formula already applied on the excel removed automatically.
Formula should be remain as it is.

I am sharing my xaml and xlsx file. In xlsx file i have written formula.
I want to update this xlsx file with formula(already applied on excel file).
Please help me.

Main.xaml (9.4 KB)
Test.xlsx (12.9 KB)


Does this link help?

Not resolved. Please give me some ideas so that I can do it.
Code already attached