How can I create a Text File In VB.NET

Dim fPath = "D:\Abc.txt"
Dim afile As New IO.StreamWriter(fPath, True)
afile.WriteLine("hello")
afile.Close()

Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim Writer As System.IO.StreamWriter
        Writer = New System.IO.StreamWriter("C:\Textfile.txt") '<-- Where to create/write to
        Writer.Write(TextBox1.Text)
        Writer.Close()
        Dim Reader As System.IO.StreamReader
        Reader = New System.IO.StreamReader("C:\Textfile.txt") '<-- where to read from
        Dim tempstring As String
        Do
            tempstring = Reader.ReadLine()
            TextBox1.Text = TextBox1.Text + tempstring + vbLf
        Loop Until tempstring = ""
    End Sub
End Class