using System;

using System.IdentityModel.Tokens.Jwt;

using System.Linq;

using System.Security.Claims;

using System.Threading;

using System.Threading.Tasks;

using Microsoft.IdentityModel.Protocols;

using Microsoft.IdentityModel.Protocols.OpenIdConnect;

using Microsoft.IdentityModel.Tokens;

public class Program

{

    static void Main(string[] args)

    {

        MainAsync(args).GetAwaiter().GetResult();

    }

    static async Task MainAsync(string[] args)

    {

          const string auth0Domain = "https://tthad.b2clogin.com/ba6750d3-d0c9-47c5-b8f6-989c1e0c0312/v2.0/"; // Your Auth0 domain

           const string auth0Audience = "a8063c4f-3c0c-4c1b-8a29-98a3c117a22e"; // Your API Identifier

​

            const string testAccessToken = "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IkdfMnNIQ3VBbG82aUdNUjhOaC0wbUxvMWlET1BEZzNwbGE0blZYOG9hZEEifQ.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.dSwVH45TppmtPBuf3q3yMPP0on2s_AgyhwXML1GofTUL9cjyJ6PdQOUHWxlbtlcFKu3o5C7T5FpYRzHfv7oJG-Tsh7QTBtAtBzP7-PYMx0dhgCRyFjl9kGNBIU9rG6OrY3eI04A_SsxStM8Ayy6LeIyktGx02qiRzxuxqIr2ZGWjhSSSj_05nSBhSXHb93vbNp03XfFRtCIJeVJKPgPNHQDl6sNrHfEpp1NipQOgZ5l6d4r2Ke2qyg25YmpZw3ith8gkoOjKH7AN_Gus-efg2Hz58vv0LAF5XhieLMvl_ax7s9rF1MtbHNzApTIwov5HQj1WVNNSbnhzujfUlZmdMw"; //Access Token

​

            IConfigurationManager<OpenIdConnectConfiguration> configurationManager = new ConfigurationManager<OpenIdConnectConfiguration>("https://tthad.b2clogin.com/tthad.onmicrosoft.com/v2.0/.well-known/openid-configuration?p=B2C_1A_Hey_signup_signin", new OpenIdConnectConfigurationRetriever());

            OpenIdConnectConfiguration openIdConfig = await configurationManager.GetConfigurationAsync(CancellationToken.None);

​

Console.WriteLine(openIdConfig.SigningKeys.ToString());

​

            TokenValidationParameters validationParameters =

                new TokenValidationParameters

                {

​

                    ValidIssuer = auth0Domain,

                    ValidAudiences = new[] { auth0Audience },

                    IssuerSigningKeys = openIdConfig.SigningKeys

                };

​

            SecurityToken validatedToken;

​

            JwtSecurityTokenHandler handler = new JwtSecurityTokenHandler();

            var user = handler.ValidateToken(testAccessToken, validationParameters, out validatedToken);

​

            // The ValidateToken method above will return a ClaimsPrincipal. Get the user ID from the NameIdentifier claim

            // (The sub claim from the JWT will be translated to the NameIdentifier claim)

            Console.WriteLine($"Token is validated. User Id {user.Claims.FirstOrDefault(c => c.Type == ClaimTypes.NameIdentifier)?.Value}");

​

​

​

            Console.WriteLine("Finished");

    }

}