IdentityModel: JsonSerializer error in Visual Studio 2022 (preview)

Hi all, When calling GetDiscoveryDocumentAsync in my Xamarin.Forms project, inside Vs2022 i get this error

_discoveryResponse = await _tokenClient.GetDiscoveryDocumentAsync(new DiscoveryDocumentRequest
{
	Address = App.Current.AppSettings.AuthEndpointUrl,
});

Error connecting to endpoint Error connecting to https://{myidentityserverurl}/.well-known/openid-configuration/jwks. The type initializer for ‘System.Text.Json.JsonSerializer’ threw an exception.

This not happen when using VS 2019 or from device (without debugger attached)

About this issue

Original URL
State: closed
Created 3 years ago
Reactions: 1
Comments: 15 (4 by maintainers)

Most upvoted comments

Hi I encountered this problem with a Xamarin.Forms app and found a solution here.

I have a working example in the WebAuthenticatorDemo-OIDCClient folder.

I used the nuget package references:- IdentityModel.OidcClient v5.0.0 System.Text.Json v6.0.2

Add this to the iOS project file:-

<ItemGroup> 
    <PackageReference Include="System.Memory" Version="4.5.4"> 
        <IncludeAssets>none</IncludeAssets> 
    </PackageReference> 
    <PackageReference Include="System.Buffers" Version="4.5.1"> 
        <IncludeAssets>none</IncludeAssets> 
    </PackageReference> 
   </ItemGroup>

Set the project (Xamarin.Forms in this case) to use .Net standard 2.1

Hope this helps

RichWoollcott on Mar 16, 2022

@amellini I used your text reporting the problem and registered it in the visual studio community. Follow the link below. If everyone reinforces the request, it would help.

https://developercommunity.visualstudio.com/search?space=61&q=System.Text.Json.JsonSerializer+error+visual+studio+2022

rogmauri on Nov 26, 2021

@leastprivilege does it happen to you (if you have VS2022)?

amellini on Sep 29, 2021