Listing users in active directory from local machine

You can make use of this function


public IEnumerable GetUsers(string GroupName)
        {
            //Users are supposed to be organized within groups
            System.DirectoryServices.DirectoryEntry myMachine = new System.DirectoryServices.DirectoryEntry(string.Format("WinNT {0},Computer",
                Environment.MachineName.ToString()));
            //Catch a group of users from the acvtive directory
            System.DirectoryServices.DirectoryEntry group = myMachine.Children.Find(GroupName, "group");
            object AllUsers = group.Invoke("members", null);

            //Enumerate them then return them as an Inumerable object
            System.DirectoryServices.DirectoryEntry userInfo;
            foreach (object userGroup in AllUsers as IEnumerable)
            {
                userInfo = new System.DirectoryServices.DirectoryEntry(userGroup);
                yield return userInfo.Name;

            }
        }


Then you can use it to display all users of a given group like so

 //Get the 'Administrators' users
            IEnumerable result = GetUsers("Administrators");

            IEnumerator resultInfo = result.GetEnumerator();
            while (resultInfo.MoveNext())
            {
                MessageBox.Show(resultInfo.Current.ToString());
            }