Inheritance: DotNetOpenAuth.AspNet.Clients.OAuth2Client
        public override ClaimsIdentity ProcessSignInResponse(string realm, string originalUrl, HttpContextBase httpContext)
        {
            var client = new AzureAdOAuthClient(_appId, _secretKey, _graphApiEndpoint, _tokenEndpoint, _authorizationEndpoint, _graphApiVersion);
            AuthenticationResult result;
            try
            {
                result = client.VerifyAuthentication(httpContext, this.MultiProtocolIssuer.ReplyUrl);
            }
            catch (WebException wex)
            {
                throw new InvalidOperationException(new StreamReader(wex.Response.GetResponseStream()).ReadToEnd(), wex);
            }

            var claims = new List<Claim>
                {
                    new Claim(System.IdentityModel.Claims.ClaimTypes.NameIdentifier, result.ExtraData["id"])
                };

            return new ClaimsIdentity(claims, "AzureAd");
        }
 public override void ProcessSignInRequest(Scope scope, HttpContextBase httpContext)
 {
     var client = new AzureAdOAuthClient(_appId, _secretKey, _graphApiEndpoint, _tokenEndpoint, _authorizationEndpoint, _graphApiVersion);
     client.RequestAuthentication(httpContext, MultiProtocolIssuer.ReplyUrl);
 }