How do we can save information from multiple URLs?

[aghfath]

Imports System.Net

	Public Class Form1

		Dim fileReader As String

		Dim t As String()

		Dim strami As String = ""

		Dim s, r As String()

		Dim orfWriter As System.IO.StreamWriter

		Dim local As String

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

			fileReader = My.Computer.FileSystem.ReadAllText("G:\test.txt")
			RichTextBox1.Text = fileReader
			Dim urls() As String = RichTextBox1.Lines
			Parallel.ForEach(urls, Sub(f)
									   If Not String.IsNullOrEmpty(f) Then
										   t = f.Split(",")
										   name = t(0)
										   't(1)=web address of Name 
										   DownloadAsync(t(1))
									   End If
								   End Sub)
			My.Computer.Audio.PlaySystemSound(
		  System.Media.SystemSounds.Asterisk)
			MsgBox("All Done!")
		End Sub
		Function DownloadAsync(URL As String) As Task(Of Boolean)
			ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12
			Dim html As String = ""
			Dim result As Boolean
			Dim request As HttpWebRequest = HttpWebRequest.Create(URL)
			request.AutomaticDecompression = DecompressionMethods.GZip
			request.Timeout = 500
			request.Method = "GET"
			request.UserAgent = "Mozilla/5.0 (Macintosh; Intel Mac OS X x.y; rv:42.0) Gecko/20100101 Firefox/42.0"
			Using response As Task(Of WebResponse) = request.GetResponseAsync
				If response.Result IsNot Nothing Then
					Using ioStream As IO.Stream = response.Result.GetResponseStream
						Using sr As New System.IO.StreamReader(ioStream)
							html = sr.ReadToEnd
							s = html.Split(";")
							r = s(0).Split(",")
							'///////////////////
							local = "G:" & Name.ToString + ".csv"
							orfWriter = New System.IO.StreamWriter(local, True, System.Text.Encoding.Unicode)
							strami = r(0) & "," & r(1) & "," & r(2) & "," & r(3)
							orfWriter.Write(strami)
							orfWriter.WriteLine("")
							orfWriter.Close()
						End Using
						result = True
					End Using
				End If
			End Using
			Return Task.FromResult(result)
			Return Task.FromResult(False)

		End Function
		Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
		End Sub
	End Class

In this program, the information of the Urls in the "G:\test.txt" are downloaded at the same time, and I want the information to be saved in its own address, in a file with its name(i.e name=t(0)). But all information of urls are saved in only one file called the last line name of RichTextBox1.Lines. How can this problem be solved? Thank you