AD object search

public XmlDocument get_Activedirectory_object_list()
{
RecursiveTraversal rt = new RecursiveTraversal();
string objinner = "";
try{
DirectoryEntry entryRoot = new DirectoryEntry("LDAP://RootDSE");
string dmain = entryRoot.Properties["defaultNamingContext"][0].ToString();
DirectoryEntry entry = new DirectoryEntry ("LDAP://" + dmain);
foreach (DirectoryEntry cd in entry.Children)
{
rt.traverse(cd,0);
}

objinner = "" + rt.obj+"";
XmlDocument xm=new XmlDocument();
xm.InnerXml = objinner;

doc = xm;
}
catch (Exception ex)
{

}
return doc;
}



public class RecursiveTraversal
{
public string obj;


public void traverse(DirectoryEntry entry,int x)
{

// Check if it is a OU
if( entry.SchemaClassName=="organizationalUnit" )
{
x++;
// Get a list of all the entries in the directory
obj = obj + " ";
foreach (DirectoryEntry di in nw.Children)
{
traverse(di, x);

}
obj = obj + " ";
}
else
{
obj = obj + ">";
obj = obj + " ";

}
}
}

}