VB.NET Upload / Download / Delete ผ่าน FTP

Public Class Form1

    Private Sub Btn_SendFtp_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btn_SendFtp.Click
        Try
            'Create Request
            Dim Request As System.Net.FtpWebRequest = DirectCast(System.Net.WebRequest.Create("ftp://ftp.myweb.com/public_html/test.txt"), System.Net.FtpWebRequest)

            'Upload Properties
            Request.Credentials = New System.Net.NetworkCredential("user", "password")
            Request.Method = System.Net.WebRequestMethods.Ftp.UploadFile

            'Read File
            Dim File() As Byte = System.IO.File.ReadAllBytes("c:\myfile.text")

            'Upload
            Dim Strz As System.IO.Stream = Request.GetRequestStream()
            Strz.Write(File, 0, File.Length)

            Strz.Close()
            Strz.Dispose()

            MessageBox.Show("Upload Done", "Messsage")

        Catch ex As Exception
            MessageBox.Show(ex.Message, "Messsage")
        End Try

    End Sub

    Private Sub Btn_LoadFtp_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btn_LoadFtp.Click
        Try
            My.Computer.Network.DownloadFile("http://www.myweb.com/test.txt", "c:\myfile_download.text")
            'Process.Start("c:\myfile_download.text")'สั่งเปิดโปรแกรม

            MessageBox.Show("Download Done", "Messsage")

        Catch ex As Exception
            MessageBox.Show(ex.Message, "Messsage")
        End Try
    End Sub

    Private Sub Btn_DelFtp_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btn_DelFtp.Click
        Try
            'Create Request
            Dim Request As System.Net.FtpWebRequest = DirectCast(System.Net.WebRequest.Create("ftp://ftp.myweb.com/public_html/test.txt"), System.Net.FtpWebRequest)

            'Upload Properties
            Request.Credentials = New System.Net.NetworkCredential("user", "password")
            Request.Method = System.Net.WebRequestMethods.Ftp.DeleteFile
            Request.GetResponse()

            MessageBox.Show("Delete Done", "Messsage")

        Catch ex As Exception
            MessageBox.Show(ex.Message, "Messsage")
        End Try
    End Sub
End Class