vb.net read txtfile and navigate to that site (own browser development) - vb.net

Question

I have built my own browser 9see attached code) however I would like to modify the code so that textbox1 reads a txt file at start and uses the contents of that text file to navigate to a URL of equal value to the text with in that text file. All this should happen at the launch of the web browser form.
Example of the text file contents would be http://www.testsite.com
Code as follows:
#Region "Webbrowser navigation"
Private Sub Go()
WebBrowser1.Navigate(TextBox1.Text)
End Sub
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
Go()
End Sub
Private Sub TextBox1_keydown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
If e.KeyCode = Keys.Enter Then
Go()
End If
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
WebBrowser1.GoBack()
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
WebBrowser1.GoForward()
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
WebBrowser1.Stop()
End Sub
#End Region
how can I best do this?

Answer 1

In the event handler for the form's Load event, do something like this:
TextBox1.Text = File.ReadAllText("StartUrl.txt")
Go()
However, unless you have some good reason to use a text file, I would suggest something more flexible and standard such as XML. If you don't mind using the standard app.config file, just add one of those to your project and you can use the ConfigurationManager class to read the setting.