Format an Excel column or cell as Text in C

Question

When I copy values from a data table to an Excel sheet, the leading zeros disappear. This is most likely a result of Excel seeing the values as numbers rather than text.

I am copying the values like so:

myWorksheet.Cells[i + 2, j] = dtCustomers.Rows[i][j - 1].ToString();

How do I format a whole column or each cell as Text?