System.DirectoryServices.AccountManagement Version 9.0: UserPrincipal.GetAuthorizationGroups() throws System.UriFormatException: Invalid URI: The hostname could not be parsed.

[uwer62]

Description

After updating from 8.0.1 to 9.0.0 the call above throws the following exception:
System.UriFormatException: Invalid URI: The hostname could not be parsed.

Reproduction Steps

var ctx = new PrincipalContext(ContextType.Domain);
var usersearcher = new PrincipalSearcher(new UserPrincipal(ctx));
var users = usersearcher.FindAll().Cast<UserPrincipal>();
var user = users.FirstOrDefault(e => e.SamAccountName == "valid user name");
var groupList = user?.GetAuthorizationGroups().ToList(); <== throws in 9.0.0

Expected behavior

This call should return the groups as the older versions

Actual behavior

Throws unexpected exception

Regression?

Yes. worked in 8.0.1

Known Workarounds

downgrade to 8.0.1

Configuration

.NET 8.0 and .NET 9.0 on Windows 11

Other information

No response

[jasasa]

I have the same issue with GetGroups(). Works in 8.0, not in 9.0.
If I include the name of the domain in the PrincipalContext-call, it works:
var ctx = new PrincipalContext(ContextType.Domain, "domainname");

[ericstj]

No repro for me with the given code sample I get the same results from both package versions. Could you please share the full details of the exception and callstack? Could you confirm what runtime are you using - .NET 8.0 or .NET 9.0? Thanks.

[uwer62]

I have created a new console application (.NET 9.0) and added the code I mentioned to Program.cs.
Here is the full code:

// See https://aka.ms/new-console-template for more information
using System.DirectoryServices.AccountManagement;

Console.WriteLine("Hello, World!");
var ctx = new PrincipalContext(ContextType.Domain);
var usersearcher = new PrincipalSearcher(new UserPrincipal(ctx));
var users = usersearcher.FindAll().Cast<UserPrincipal>();
var user = users.FirstOrDefault(e => e.SamAccountName == "Here I used a valid user name in our domain");
var groupList = user?.GetAuthorizationGroups().ToList();
Console.WriteLine(groupList.Count.ToString());

Then I added System.DirectoryServices.AccountManagetment 9.0.0 and ran the code
The exception is thrown in the following line:
var user = users.FirstOrDefault(e => e.SamAccountName == "Here I used a valid user name in our domain");

HResult: -2146233033
Message: Invalid URI: The hostname could not be parsed.
Source: System.Private.Uri
Stack Trace:
at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind, UriCreationOptions& creationOptions)
at System.Uri..ctor(String uriString)
at System.DirectoryServices.AccountManagement.ADStoreCtx.LoadDomainInfo()
at System.DirectoryServices.AccountManagement.ADStoreCtx.get_DnsDomainName()
at System.DirectoryServices.AccountManagement.ADStoreCtx.GetGroupsMemberOfAZ(Principal p)
at System.DirectoryServices.AccountManagement.UserPrincipal.GetAuthorizationGroupsHelper()
at System.DirectoryServices.AccountManagement.UserPrincipal.GetAuthorizationGroups()
at Program.

$(String[] args) in C:\Users\ur\source\repos\ConsoleApp1\ConsoleApp1\Program.cs:line 9

[uwer62]

I can confirm @jasasa's comment that the problem goes away if I add the name of our domain to the following line:
var ctx = new PrincipalContext(ContextType.Domain, "our domain name");

[steveharter]

Appears to be introduced by https://github.com/dotnet/runtime/pull/89787/files#diff-36ef1673850535f3dd5645a5b990a17652b2eaff381d3abaed74fc29278665afR2421