VS 2005 - Nested Loop

I doing a nested for loop to achieve from #123,33.5,1283485089#44.6,Timestamp#124,66.7,timestamp#55.7,timestamp#125,76.4,timestamp#42.8,timest amp whole string to #123,33.5,1283485089#123,44.6,Timestamp#124,66.7,timestamp#124,55.7,timestamp#125,76.4,timestamp#125 ,42.8,timestamp. My code get me back same thing again

Dim i = 0
Dim rsplitdata As String()
Dim row, item As String
Dim inex
Dim rdata As String() = TextBox1.Text.Split("#")
For Each row In rdata
rsplitdata = row.Split(",")
If (i = 0) Then
inex = rsplitdata(0)
'rdata(i) = inex + "," + rdata(i)
Else
rdata(i) = inex + "," + rdata(i)
End If
i = i + 1
Next
For Each row In rdata
rsplitdata = row.Split(",")
For Each item In rsplitdata
TextBox2.Text = TextBox2.Text + item.ToString + vbCrLf
Next
Next