Voici un exemple de code afin d'accèder aux membres d'un groupe dans l'AD ...

           String
ADFullPath =LDAP://NomDeLAD;
DirectoryEntry Ldap =new DirectoryEntry(ADFullPath);
DirectorySearcher searcher =new DirectorySearcher(Ldap);
searcher.Filter ="(&(objectClass=group)(cn="+ GroupName +"))";
SearchResult results = searcher.FindOne(); if (results
!=null)
{ DirectoryEntry AdGroup =new DirectoryEntry(results.Path);
System.DirectoryServices.PropertyCollection pcoll = AdGroup.Properties; int n = pcoll["member"].Count; for (int l = 0;
l < n; l++) { DirectoryEntry AdUser =new DirectoryEntry(ADFullPath +"/"+ pcoll["member"][l].ToString());
TreeNode tn =new TreeNode(AdUser.Properties["name"].Value.ToString());
tvwMembres.Nodes.Add(tn); TreeNode tn1 =new TreeNode(AdUser.Properties["description"].Value.ToString());
tn1.ImageIndex = 2;
tn1.SelectedImageIndex = tn1.ImageIndex;
tn1.ToolTipText ="description";
tn.Nodes.Add(tn1); TreeNode tn2 =new TreeNode(AdUser.Properties["sAMAccountName"].Value.ToString());
tn2.ImageIndex = 1;
tn2.SelectedImageIndex = tn2.ImageIndex;
tn2.ToolTipText ="Account
Name"; tn.Nodes.Add(tn2); TreeNode tn3 =new TreeNode(AdUser.Properties["mail"].Value.ToString());
tn3.ImageIndex = 3;
tn3.SelectedImageIndex = tn3.ImageIndex;
tn3.ToolTipText ="Mail";
tn.Nodes.Add(tn3); TreeNode tn4 =new TreeNode(AdUser.Properties["physicalDeliveryOfficeName"].Value.ToString());
tn4.ImageIndex = 4;
tn4.SelectedImageIndex = tn4.ImageIndex;
tn4.ToolTipText ="Office
Name"; tn.Nodes.Add(tn4); AdUser.Close(); } Ldap.Close(); AdGroup.Close();