using System;
using System.DirectoryServices;

namespace EnumerateGroupUsers
{
	class Class1
	{
		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main(string[] args)
		{
			DirectoryEntry domainController = new DirectoryEntry(@"LDAP://"+"MYDOMAIN"+@"/RootDSE");
			domainController.AuthenticationType = AuthenticationTypes.Secure;
			string ldapUrl = @"LDAP://"+domainController.Properties["defaultNamingContext"][0].ToString();

			EnlistUsers(ldapUrl, "MYGROUP");
		}
		static void EnlistUsers(string root, string groupName)
		{
			string filter;
			if (null!=groupName)
				filter = string.Format("(&(objectClass=group)(objectCategory=group)(cn={0}))", groupName);
			else
				filter = null;
			if (null==root)
			{
				DirectoryEntry domainController = new DirectoryEntry(@"LDAP://"+"MYDOMAIN"+@"/RootDSE");
				domainController.AuthenticationType = AuthenticationTypes.Secure;
				root = @"LDAP://"+domainController.Properties["defaultNamingContext"][0].ToString();
			}
			DirectorySearcher ds = new DirectorySearcher(new DirectoryEntry(root, null, null, AuthenticationTypes.Secure), filter);
			ds.SearchScope = SearchScope.Subtree;
			SearchResultCollection srcGroup = ds.FindAll();
			foreach (SearchResult res in srcGroup)
			{
				if (res.Properties["objectClass"].Contains("group"))
				{ // this is group, cycle thru' members
					foreach (object val in res.Properties["member"])
					{
						string s;
						s = Convert.ToString(val);
						EnlistUsers("LDAP://" + s, null);
					}
				}
				else // this is a regular user, deal with its data
				{
					ResultPropertyValueCollection memberOf = res.Properties["memberof"];
					foreach (string s in memberOf)
					{
						Console.WriteLine("group: {0}", s);
					}

					string name = res.Properties.Contains("givenName") ? (string)res.Properties["cn"][0] : null;
					string mail = res.Properties.Contains("mail") ? (string)res.Properties["mail"][0] : null;
					if (null!=name && null!=mail)
						Console.WriteLine("{0} - {1}", name, mail);
					foreach (string key in res.Properties.PropertyNames)
					{
						foreach (object val in res.Properties[key])
						{
							string s="";
							if (null!=val)
							{
								if (val.GetType()==typeof(byte[]))
								{
									byte[] ab = (byte[])val;
									if(16==ab.Length) // guid
									{
										Guid g = new Guid(ab);
										s = g.ToString();
									}
									else
									foreach (byte b in ab)
										s += b.ToString("X2");
								}
								else
									s = Convert.ToString(val);
							}
							else
								s = "(null)";
							Console.WriteLine("{0}: {1}", key, s);
						}
						Console.WriteLine();
					}
				}
			}
		}
	}
}