After filling out the color of the cells - the cells are white

Oct 15, 2014 at 7:06 AM
Edited Oct 15, 2014 at 7:11 AM
Problem.
After filling the cell values (from template) ​​(sheet.Cells[1,1].Value), colored cells are white.
It is necessary to remember the style of the cell before it is filled?
How to do it correctly?

Thanks.