get user names in an Active Directory Group via .net

Question

The below code gets me the users in the group but it is returned "CN=johnson\,Tom,OU=Users,OU=Main,DC=company,DC=com"

I want to just return the First and Last name. How can I accomplish this?

DirectoryEntry ou = new DirectoryEntry();
DirectorySearcher src = new DirectorySearcher();

src.Filter = ("(&(objectClass=group)(CN=Gname))");
SearchResult res = src.FindOne();
if (res != null)
{
    DirectoryEntry deGroup = new DirectoryEntry(res.Path);
    PropertyCollection pcoll = deGroup.Properties;

    foreach (object obj in deGroup.Properties["member"])
    {
            ListBox1.Items.Add(obj.ToString());
    }
}

Answer 1

I prefer using the classes in System.DirectoryServices.AccountManagement:

PrincipalContext principalContext = new PrincipalContext(ContextType.Domain);
GroupPrincipal group = GroupPrincipal.FindByIdentity(principalContext, "GName");

Search through the group.Members property until you have a Principal that you want. Then extract the name like this:

foreach (Principal principal in group.Members)
{
   string name = principal.Name;
}

Answer 2

Using your code, the givenName (first name) and sn (last name) properties should work.

If you use the System.DIrectoryServices.AccountManagement namespace UserPrincipal (as @russell-mcclure suggested), you will find GivenName and Surname properties also.

AccountManagement is very handy unless you have to traverse a trusted forest and need the global catalog to find the user.