How to Authenticate LDAP in .NET

Question

I would like to authenticate username and passwords for my application on a windows operating system with any directory service. For example it could be microsoft active di

Answer 1

We had a website that needed to authenticate a username and password against domain credentials and used the LogonUser API function. Use it for a network logon (one of its arguments is logon type) and all it does is validate credentials, it doesn't do things like load the users profile that runas would. Only caveat is that the service account does require sufficient access to call LogonUser. I suggest you check the MSDN documentation for what that access is though because it varies by OS.