Have you tried this:
Dim reader as new system.io.streamreader("yourCSVFile.CSV"), lineIn as string
For x as integer = 0 to 4
While reader.peak <> -1
LineIn = reader.readline
'Do your processing on LineIn. If you call readline again, it'll go to the next line
?? Though a cleaner way would be to write logic and deduce which lines are the bad lines, incase its more than 5, less, etc. Code like this can have undesired effects later if you change the file.