Dim words = New String() {"een", "twee", "drie"}
 
Using fs As FileStream = New FileStream("C:\Temp\array.txt", FileMode.Append, FileAccess.Write)
 
    Dim encoder = New UTF8Encoding()
    Dim bytes As Byte()
 
    For Each word As String In words
        bytes = encoder.GetBytes(word + "|")
        fs.Write(bytes, 0, bytes.Length)
    Next
 
    bytes = encoder.GetBytes(vbNewLine)
    fs.Write(bytes, 0, bytes.Length)
 
End Using

Using sr As StreamReader = New StreamReader("C:\Temp\array.txt", Encoding.UTF8)
 
    For Each line As String In sr.ReadToEnd().Split(vbNewLine)
        For Each word As String In line.Split("|")
            Console.Write(word & " ")
        Next
    Next
 
End Using