Pnp-sites-core: AuthenticationManager().GetAppOnlyAuthenticatedContext failing in dotnet Core

[donshults]

Did a quick test of a the .GetAppOnlyAuthenticatedContext. One using Framework 4.6.1, the other using Core 2.1. The Framework version works fine and returns the title of each list.
Here's the error when running in Core:
System.MissingMethodException
HResult=0x80131513
Message=Method not found: 'System.Runtime.Remoting.ObjectHandle System.Activator.CreateInstance(System.String, System.String)'.
Source=OfficeDevPnP.Core
StackTrace:
at OfficeDevPnP.Core.Diagnostics.Log.InitializeLogger()
at OfficeDevPnP.Core.Diagnostics.Log.Debug(String source, String message, Object[] args)
at OfficeDevPnP.Core.AuthenticationManager.EnsureToken(String siteUrl, String realm, String appId, String appSecret, String acsHostUrl, String globalEndPointPrefix)
at OfficeDevPnP.Core.AuthenticationManager.GetAppOnlyAuthenticatedContext(String siteUrl, String appId, String appSecret)
at TestPNPTool.Program.Main(String[] args) in C:\Users\donald.shults\Source\Repos\SPOListUpdater\TestPNPTool\Program.cs:line 17

Here's the test code using a simple console app:

    static void Main(string[] args)
    {
        string siteUrl = "https://<tenant url>/sites/spdev";
        string clientId = "<clientid>";
        string clientSecret = "<appsecret>";

        using (var clientContext = new AuthenticationManager().GetAppOnlyAuthenticatedContext(siteUrl, clientId, clientSecret))
        {
            Web oWebsite = clientContext.Web;
            ListCollection collList = oWebsite.Lists;
            clientContext.Load(collList);
            clientContext.ExecuteQuery();
            foreach (List list in collList)
            {
                Console.WriteLine("Name: " + list.Title);
            }
        }

        Console.ReadLine();
    }

[kmcknight1973]

Yes, I'll be very interested for support on core 2.1 as I've encountered the same issue. Any work around on this?

[ShriramDeshkar]

I m facing the same error while using AuthenticationManager().GetSharePointOnlineAuthenticatedContextTenant() method using .NetCore2.1
Any suggestions on how to resolve this ?

[Ofer-Gal]

When used with framework, I got the warning:
Warning NU1701 Package 'Microsoft.SharePointOnline.CSOM 16.1.19404.12000' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework '.NETCoreApp,Version=v2.2'

So now I have it running in netcoreapp2.2 but I get the same error on OfficeDevPnP.Core.GetAppOnlyAuthenticatedContext
Is there another way to get App Only Authenticated Context without OfficeDevPnP.Core?

[gautamsyadav]

I am facing the same issue. Any updates?

[christophwille]

Also interested in .NET Core support (my target: 3.1). For me

var ctx = new AuthenticationManager().GetAppOnlyAuthenticatedContext(url, clientId, clientSecret);

is failing with

            System.TypeInitializationException
              HResult=0x80131534
              Message=The type initializer for 'OfficeDevPnP.Core.Utilities.TokenHelper' threw an exception.
              Source=OfficeDevPnP.Core
              StackTrace:
               at OfficeDevPnP.Core.Utilities.TokenHelper.set_Realm(String value)
               at OfficeDevPnP.Core.AuthenticationManager.EnsureToken(String siteUrl, String realm, String appId, String appSecret, String acsHostUrl, String globalEndPointPrefix)
               at OfficeDevPnP.Core.AuthenticationManager.GetAppOnlyAuthenticatedContext(String siteUrl, String realm, String appId, String appSecret, String acsHostUrl, String globalEndPointPrefix)
               at OfficeDevPnP.Core.AuthenticationManager.GetAppOnlyAuthenticatedContext(String siteUrl, String appId, String appSecret)
               at CoreTestSharepoint.Program.GetSiteCollectionWithAppOnly(String clientId, String clientSecret, String url) in d:\TfsWorkspace\CoreTestSharepoint\CoreTestSharepoint\Program.cs:line 27
               at CoreTestSharepoint.Program.Main(String[] args) in d:\TfsWorkspace\CoreTestSharepoint\CoreTestSharepoint\Program.cs:line 22

            Inner Exception 1:
            TypeLoadException: Could not load type 'System.Web.Configuration.WebConfigurationManager' from assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.

(I added System.Configuration.ConfigurationManager manually because it failed there first - but System.Web is definitely full stop for .NET Core)

[rbleattler]

Has this issue seen any movement? I'm hitting this as well trying to Connect using PowerShell 7.

[westerdaled]

@rbleattler , glad you posted, as I have been scratching my head for 30 mins on this issue untll I realised I hadn't change my Shell to Windows PowerShell in VSCode from PowerShell Core 7 😣 . SharePointPnPPowerShellOnline Commandlets are not support in PowerShell 7.
Connect-PnPOnline -AppId $env:SPO_AppId -AppSecret $env:SPO_AppSecret -Url $in
I am now connected at last....

[adrichema]

Any new regarding this issue?

[ypcode]

Hi guys,

as far as I know, PnP Sites Core is currently not supporting .NET Core since CSOM is not supporting it either for now

But that should come quite soon ! Anyway, it will come with some limitations (e.g. SharePointOnlineCredentials not supported, ...)
You will have some info about it in the recent SIG call here https://youtu.be/gtusCyOYePs?t=890

[luizs81]

It seems that now Microsoft.SharePointOnline.CSOM supports .NET Core.
https://developer.microsoft.com/en-us/microsoft-365/blogs/net-standard-version-of-sharepoint-online-csom-apis/

I know it's not easy but I hope the PnP team can catch up. :)

[piteerus]

Guys,
For .NET Standard 2.1 I'm receiving the following error:
OfficeDevPnP.Core: Could not load type 'System.Web.UI.HtmlTextWriter' from assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
Could you please take a look and comply with netstandard2.1?

[garrjo]

Still an issue on .NET Standard 3.1 - > Exception Type Initializer: OfficeDevPnP.Core.Utilities.TokenHelper.

[antonio-gabriele]

Do you think can we rewrite TokenHelper.cs?

[svermaak]

Same issue :(

[dnyaneshwar-surywanshi]

I am using .net core 3.1 and getting same issue :

System.TypeInitializationException: The type initializer for 'OfficeDevPnP.Core.Utilities.TokenHelper' threw an exception.
---> System.TypeLoadException: Could not load type 'System.Web.Configuration.WebConfigurationManager' from assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
at OfficeDevPnP.Core.Utilities.TokenHelper..cctor()