You need the following to take full advantage of the functionality offered in the classes:
To use Novell.Directroy.Ldap on the Windows OS, you need to setup your Microsoft* .NET project using Novell.Directory.Ldap.
You need mono.security.dll, if the setup is Microsoft* .NET on the Windows OS. You can download Mono™ from http://www.mono-project.com/downloads and copy mono.security.dll to an appropriate location in your project.
To use Novell.Directroy.Ldap on Linux, you need to have Mono® (compiler, runtime and class libraries) installed on your Linux box. You can download Mono from http://www.mono-project.com/downloads/.