private static void TestArticle(NntpClient client, NntpGroup @group)
{
// get article by message id
ShowArticle(client.Article("<*****@*****.**>").Article);
// select group alt.test.clienttest with article numbers
ShowGroup(client.ListGroup("alt.test.clienttest").Group);
// get first article in group
ShowArticle(client.Article().Article);
// get last article in group
ShowArticle(client.Article(@group.HighWaterMark).Article);
}