Obtain the network neighbor information of the web server's LAN

The previous article mentioned the use of the Messenger Service on the web.
I used the following methods to obtain client information in a LAN (peer network:

Using system. directoryservices; // reference the namespace

Directoryentry entrypc = new directoryentry ("winnt :");
Foreach (directoryentry child in entrypc. Children)
{
Treenode node = new treenode ();
Node. Text = Child. schemaclassname + ":" + child. Name;
Pctree. nodes. Add (node );

Foreach (directoryentry PC in child. Children)
{
If (string. Compare (PC. schemaclassname, "computer", true) = 0)
{
Treenode son = new treenode ();
Son. Text = pc. Name;
Node. nodes. Add (son );
}
}
}

Note: if there are many computers in the LAN, this process will be slow, so you need to adopt some policies to get a faster client experience.