public void TestSeek()
{
using (var stream = new SmtpStream(new DummyNetworkStream(), new NullProtocolLogger())) {
Assert.Throws <NotSupportedException> (() => stream.Seek(0, SeekOrigin.Begin));
Assert.Throws <NotSupportedException> (() => stream.Position = 500);
Assert.AreEqual(0, stream.Position);
Assert.AreEqual(0, stream.Length);
}
}