C# Authentication via LDAP. Works on ASP .NET, MVC and Console App.
You will need to include Novell.Directory.Ldap.NETStandard or Novell.Directory.Ldap.NETStandard2_0 if your project is using .NET Core https://www.nuget.org/packages/Novell.Directory.Ldap.NETStandard/
https://www.nuget.org/packages/Novell.Directory.Ldap.NETStandard2_0/