when i use worksheet.Cells[index] its not return all column !!
```
foreach(var d in worksheet.Cells[1, 1, 1, ws.Dimension.End.Column]) // return 17 row [wrong]
for (int i = 1; i < ws.Dimension.End.Column + 1; i++) // return 21 row [right]
```
why i get the different result.
```
foreach(var d in worksheet.Cells[1, 1, 1, ws.Dimension.End.Column]) // return 17 row [wrong]
for (int i = 1; i < ws.Dimension.End.Column + 1; i++) // return 21 row [right]
```
why i get the different result.