UserInfo Endpoint
The client library for the OpenID Connect UserInfo endpoint is provided as an extension method for HttpClient.
The following code sends an access token to the UserInfo endpoint:
var client = new HttpClient();
var response = await client.GetUserInfoAsync(new UserInfoRequest{ Address = disco.UserInfoEndpoint, Token = token});
The response is of type UserInfoResponse and has properties for the standard response parameters. You also have access to the raw response and to a parsed JSON document (via the Raw and Json properties).
Before using the response, you should always check the IsError property to make sure the request was successful:
if (response.IsError) throw new Exception(response.Error);
var claims = response.Claims;