ASP.NET Core 2.0 LDAP Active Directory Authentication

Question

I have found a lot of information from the past saying that LDAP authentication isn\'t enabled yet but you can get around that using third party packages. However, it seems

Answer 1

The LDAP Authentication can be achieved using System.DirectoryServices.Protocols namespace.

public Boolean IsAuthenticated(string username, string password,string domain)
{
    Boolean authenticated = false;
    //pass the connectionString here
    using (LdapConnection connection = new LdapConnection(connectionString))
    {
       try
       {
           username = username + domain;
           connection.AuthType = AuthType.Basic;
           connection.SessionOptions.ProtocolVersion = 3;
           var credential = new NetworkCredential(username, password);
           connection.Bind(credential);
           authenticated = true;
           return authenticated;
       }
       catch (LdapException)
       {
           return authenticated;
       }
       finally
       {
           connection.Dispose();
       }
   }}