Active Directory - basics to pull up user info

public static DirectoryEntry GetDirectoryEntry()
    {
        DirectoryEntry de = new DirectoryEntry("LDAP://19dc01", "USERNAME", "PASSWORD");
        return de;
    }
 
 
    public bool UserExists(string username)
    {
        DirectoryEntry de = GetDirectoryEntry();
        DirectorySearcher deSearch = new DirectorySearcher();
 
        deSearch.SearchRoot = de;
        deSearch.Filter = "(&(objectClass=user) (cn=" + username + "))";
 
        SearchResultCollection results = deSearch.FindAll();
 
        return results.Count > 0;
    }
 
    public String GetProperty(String userAccount, String propertyName)
    {
        DirectoryEntry entry = GetDirectoryEntry();
        String account = userAccount.Replace(@"DOMAIN\", "");
 
        try
        {
            DirectorySearcher search = new DirectorySearcher(entry);
            search.Filter = "(SAMAccountName=" + account + ")";
            search.PropertiesToLoad.Add(propertyName);
 
            SearchResult result = search.FindOne();
 
            if (result != null)
            {
                return result.Properties[propertyName][0].ToString();
            }
            else
            {
                return "Unknown User";
            }
        }
        catch (Exception ex)
        {
            string debug = ex.Message;
            return "";
        }
    }

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