How to add a Return Function

I am currently writing to a .txt file i would like to know how to add a 'return' function so when writing to the text file for it doesnt do this:

Testtesttesttesttesttest

But instead

Test

This is my current code (whilst i understand its basic its working so far)

 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

    My.Computer.FileSystem.WriteAllText("F:\Documents\Documents\Visual Studio 2015\Projects\ExtentionLocator\ExtentionLocator\test.txt",
    TextBox1.Text, True)

    My.Computer.FileSystem.WriteAllText("F:\Documents\Documents\Visual Studio 2015\Projects\ExtentionLocator\ExtentionLocator\test.txt",
    "   ", True)

    My.Computer.FileSystem.WriteAllText("F:\Documents\Documents\Visual Studio 2015\Projects\ExtentionLocator\ExtentionLocator\test.txt",
    TextBox2.Text, True)

    My.Computer.FileSystem.WriteAllText("F:\Documents\Documents\Visual Studio 2015\Projects\ExtentionLocator\ExtentionLocator\test.txt",
    "   ", True)

    My.Computer.FileSystem.WriteAllText("F:\Documents\Documents\Visual Studio 2015\Projects\ExtentionLocator\ExtentionLocator\test.txt",
    TextBox3.Text, True)

End Sub

Solution

The proper way to specify a line break is with Environment.NewLine:

TextBox1.Text & Environment.NewLine

There are lots of ways to specify carriage returns and line feeds but the most correct way to specify a line break is with Envirnment.NewLine. It will return the a String containing the appropriate characters for the current system, which will be a carriage return and line feed pair on Windows (CR-LF, \r\n in C-based languages, ASCII 13 and 10) and a line feed alone on non-Windows systems.