Android Question is regex.split need to be flushed ?

Public Sub NewData (data() As Byte)

Dim msg As String
msg = BytesToString(data, 0, data.Length, "UTF-8")
msg = msg.Trim

'Sanity check
If msg.Length = 0 Then
   Log("Error: Empty message received")
   Return
End If

'Dim param As String = msg
Dim paramnum() As String = Regex.Split("\&", msg)

'Let's see what command came in
If paramnum(0) = "Command1" Then
   'Let's process our parameters for Command1
   For i = 1 To paramnum.Length-1
      'Log all non-empty parameters
      If paramnum(i) <> "" Then
         log(paramnum(i))
      End If
      'Sleep(0)
   Next
   'Let's send out for Command2
   If connected = True Then
      SendData(Bconv.StringToBytes("1"&"Command2~", "UTF-8"))
   End If
Else If paramnum(0) = "Command2" Then
   'Command2 came in, let's log the single parameter associated with it
   'Let's make sure it came in correctly
   If paramnum.Length = 2 Then
      Log(paramnum(1))
   Else
      Log("Error: Expected 1 parameter with Command2 but received: " & paramnum.Length - 1 & " commands")
      Log("Error (cont.): Message received was: " & msg)
   End If
Else
   'We neither received Command1 nor Command2, something is up
   Log("Error: Neither Command1 nor Command2 was received.")
   Log("Error (cont.): Message received was: " & msg)
End If
End Sub