Socket.Poll confusion

[soaphead]

Can I use Socket.Poll for blocking socket?
It is unclear in documentation if I can use this with a synchronous socket,
can my code possibly turn a synchronous socket to asynchronous?
It seems to work but I have some problems with
outside.Receive , it gives me a SocketException "An existing connection was
forcibly closed by the remote host"
at random times, also outside.Poll will say it has data but outside.Receive
returns with nothing sometimes.
I can't use socket.availabl e because it needs a asynchronous socket.

Socket outside = new Socket(AddressF amily.InterNetw ork, SocketType.Stre am,
ProtocolType.Tc p);
this is part of a threadpool Waitcallback method
----------------
while(flag)
{
try
{
if(outside.Poll (1000000,Select Mode.SelectRead )==false)
{ // if socket just sits there 100000 = 1 second
flag=false;
}
else
if((bytecount=o utside.Receive( recvbuffer2,0,r ecvbuffer2.Leng th,0))==0)
{
flag=false;
}
else if(clientSocket .Poll(1000000,S electMode.Selec tWrite))
{
clientSocket.Se nd(recvbuffer2, 0,bytecount,0);
c=5;
lock(this)
{ // for debugging
Writetb2("ID " +rnum+ "\r\n" +
System.Text.Enc oding.ASCII.Get String(recvbuff er2,0,bytecount )+"\r\n"+
"\r\n");
}
bytecount=0;
}
}
catch(Exception e)
{
clientSocket.Sh utdown(SocketSh utdown.Both);
clientSocket.Cl ose();
lock(this)
{
Form1.tcount-=1;
Writetb1("Threa d count",Form1.tc ount); // to delegate Invoked
Writetb2(e.ToSt ring()+"\r\n");
}
return;
}
}

thanks Mike