public void TestRead()
{
using (var stream = new SmtpStream(new DummyNetworkStream(), new NullProtocolLogger())) {
var buffer = new byte[16];
Assert.Throws <NotImplementedException> (() => stream.Read(buffer, 0, buffer.Length));
Assert.ThrowsAsync <NotImplementedException> (async() => await stream.ReadAsync(buffer, 0, buffer.Length));
}
}