How do I get group description of a user from external active directory using LDAP

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C#

LDAP

active-directory

Hi All,

I've a requirement where in I need to get all the group description of which the user is member of and also of those group's description as well whose member the user is not.
The connection to the external domain has to be trough LDAP with port 389 and with user's credential.

What I have tried:

I am able to validate the user using below code:

<pre>public string UserValidation(string username, string domain, string password, string url)
    {
        var credentials = new NetworkCredential(username, password, domain);
        var serverId = new LdapDirectoryIdentifier(url);

        LdapConnection connection = new LdapConnection(serverId, credentials);

        string result = "true";

            try
            {
                connection.Bind();
            }
            catch (Exception e)
            {
                result = e.ToString();
            }

            connection.Dispose();

            return result;

        }