Start from 2010 (https://landpyactivedirectory.codeplex.com/), which will help you to manage Active Directory(LDAP protocol) with out complex filter syntax!
This library has been trusted by Lenovo, Sony，Tempursealy, BoostSolutions and other corporations.
Plugin for easy Active Directory integration with your ASP.NET project. Works with both Windows Authentication or you can make the user login using his Windows User.
(Only Works in IntraNet App).
Repeating code and reinventing the wheel is generally considered bad practice. At Unosquare we are committed to beautiful code and great software. Swan is a collection of classes and extension methods that we and other good developers have developed and evolved over the years. We found ourselves...
DSInternals SAM implements a client for the Security Accounts Manager Remote Protocol (SAM-R) and Local Security Authority Remote Protocol(MS-LSAD or LSARPC). It can be used to import password hashes into Active Directory or to query and modify LSA Policy.
This library has Active directory specific actions to find users, group on various search parametes.
I have provided link of my blog as Project-Site and you can find complete details of library and code repository location of github from my blog.