[VB.NET]REQ: Client/Server

mports System.Net.Sockets
Imports System.Text
Class TCPCli
Shared Sub Main()

Dim tcpClient As New System.Net.Sockets.TcpClient()
tcpClient.Connect("127.0.0.1", 8000)
Dim networkStream As NetworkStream = tcpClient.GetStream()
If networkStream.CanWrite And networkStream.CanRead Then
' Do a simple write.
Dim sendBytes As [Byte]() = Encoding.ASCII.GetBytes("Is anybody there")
networkStream.Write(sendBytes, 0, sendBytes.Length)
' Read the NetworkStream into a byte buffer.
Dim bytes(tcpClient.ReceiveBufferSize) As Byte
networkStream.Read(bytes, 0, CInt(tcpClient.ReceiveBufferSize))
' Output the data received from the host to the console.
Dim returndata As String = Encoding.ASCII.GetString(bytes)
Console.WriteLine(("Host returned: " + returndata))
Else
If Not networkStream.CanRead Then
Console.WriteLine("cannot not write data to this stream")
tcpClient.Close()
Else
If Not networkStream.CanWrite Then
Console.WriteLine("cannot read data from this stream")
tcpClient.Close()
End If
End If
End If
' pause so user can view the console output
Console.ReadLine()
End Sub
End Class

Imports System.Net.Sockets
Imports System.Text
Class TCPSrv
Shared Sub Main()
' Must listen on correct port- must be same as port client wants to connect on.
Const portNumber As Integer = 8000
Dim tcpListener As New TcpListener(portNumber)
tcpListener.Start()
Console.WriteLine("Waiting for connection...")
Try
'Accept the pending client connection and return
'a TcpClient initialized for communication.
Dim tcpClient As TcpClient = tcpListener.AcceptTcpClient()
Console.WriteLine("Connection accepted.")
' Get the stream
Dim networkStream As NetworkStream = tcpClient.GetStream()
' Read the stream into a byte array
Dim bytes(tcpClient.ReceiveBufferSize) As Byte
networkStream.Read(bytes, 0, CInt(tcpClient.ReceiveBufferSize))
' Return the data received from the client to the console.
Dim clientdata As String = Encoding.ASCII.GetString(bytes)
Console.WriteLine(("Client sent: " + clientdata))
Dim responseString As String = "Connected to server."
Dim sendBytes As [Byte]() = Encoding.ASCII.GetBytes(responseString)
networkStream.Write(sendBytes, 0, sendBytes.Length)
Console.WriteLine(("Message Sent /> : " + responseString))
'Any communication with the remote client using the TcpClient can go here.
'Close TcpListener and TcpClient.
tcpClient.Close()
tcpListener.Stop()
Console.WriteLine("exit")
Console.ReadLine()
Catch e As Exception
Console.WriteLine(e.ToString())
Console.ReadLine()
End Try
End Sub
End Class