public void Seek_Throws(SeekOrigin origin, long seekOffset, bool delayedWriter) { int length = 10; byte[] finalBuffer = new byte[length]; MemoryStream memStream = new MemoryStream(finalBuffer); BufferedStreamWriter s = new BufferedStreamWriter(memStream, GetConfig(4)); Assert.Throws <NotSupportedException>(() => s.Seek(seekOffset, origin)); }