creating text file in VB.NET adding extra line - vb.net

Question

I am trying to create text file with the code below; but there is always an extra line at the end that I cannot get rid of. Is there any way to modify this code to write the text file without the last line?? Help appreciated:
Imports System.IO
Public Class Form1
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim MekdamFile As String
MekdamFile = "C:\TEMP\MEKDAM.txt"
Dim dones As New List(Of String)
For i = 1 To 10
dones.Add("test test " & i)
Next
Using sw As New StreamWriter(MekdamFile)
For Each i As String In dones
sw.WriteLine(i)
Next
End Using
End Sub
End Class
Thanks for help in advance...

Answer 1

StreamWriter.WriteLine always writes a line terminator.
On the last iteration of the loop you could use sw.Write instead.

Answer 2

Your code can be simplified a bit:
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
File.WriteAllText("C:\TEMP\MEKDAM.txt", [String].Join( _
Environment.NewLine, _
Enumerable.Range(1, 10).[Select](Function(i) "Test test" + Cstr(i))))
End Sub

Answer 3

You are calling WriteLINE, so whatever you pass into it will be appended with a newline character sequence.
If you don't want to write the newline, use Write instead of WriteLine. Of course, you should then append the newline yourself for all lines except the last.
Alternatively, for a small text, just build the whole text, then trim the end of it and write it at once:
Dim sb As new StringBuilder();
For i = 1 To 10
sb.AppendLine("line " + i);
Next
File.WriteAllText(path, sb.ToString().TrimEnd());