Reordering of datagridview using up and down button

For reordeering of rows in a bounded datagridview, i got some code
from the net.I am posting it here.But while i use this code, I am getting error in the first line itself saying that CurrentRowIndex
is not a member of system.windows.forms.datagridview. )Is it b;cuz of 3.5 framework.??).
Can any body help me to correct the codings.

This one is for the UP button....

Dim Index As Integer = datagrid.CurrentRowIndex

If Index > 0 And Index <= datagrid.VisibleRowCount - 1 Then
For i = 0 To datagrid.VisibleColumnCount - 1
CurrInd = datagrid.CurrentRowIndex()
Obj = datagrid.Item(CurrInd - 1, i)
datagrid.Item(CurrInd - 1, i) = datagrid.Item(CurrInd, i)
datagrid.Item(CurrInd, i) = Obj
Next
datagrid.CurrentRowIndex = CurrInd - 1
End If
datagrid.Refresh()