Dim book As New C1XLBook()
Dim i As Integer
   Dim sheet As XLSheet = book.Sheets(0)
   For i = 0 To 9
         sheet(i, 0).Value = (i + 1) * 10
         sheet(i, 1).Value = (i + 1) * 100
         sheet(i, 2).Value = (i + 1) * 1000
   Next
End Function)
End Sub

C1XLBook book = new C1XLBook();
int i;
XLSheet sheet = book.Sheets[0];
    for (i = 0; i <= 9; i++)
     {
       sheet[i, 0].Value = (i + 1) * 10;
       sheet[i, 1].Value = (i + 1) * 100;
       sheet[i, 2].Value = (i + 1) * 1000;
      }