System.DirectoryServices.AccountManagement PrincipalContext not picking up Current Logged In User Credentials

Hi,

Not sure if this is the correct place to post this question, but I'm trying to implement a Web Part using the Active Directory Services System.DirectoryServices.AccountManagement and am having issues with the credentials when trying to create a new PrincipalContext object.

I've tried a number of options but for some reason I always get access denied when I try to create a new Active Directory User even though I'm logged in with a user that has full delegate rights to create users in Active Directory.

The code to create the PrincipalContext is below:

PrincipalContext domainContext = new PrincipalContext(
                        ContextType.Domain,
                        null,
                        Container);

Where Container is a variable that holds the name of the actual OU I'm working with. I've also tried it with ContextOptions.Negotiate in the constructor.

If I put the Username and Password into the constructor then it works fine without any issues - however I can't do this in my implementation as different users will have access to the Web Part and they will have delegated rights to a specific OU in Active Directory - so it should automatically pick up their current credentials.

The Web Application is setup in classic mode using NTLM.

Any ideas.

Thanks.