protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
var cerificateThumbprint = CloudConfigurationManager.GetSetting(Constants.KeyVaultAuthCertThumbprintSetting);
var authenticationClientId = CloudConfigurationManager.GetSetting(Constants.KeyVaultAuthClientIdSetting);
var certificate = CertificateHelper.FindCertificateByThumbprint(cerificateThumbprint);
var assertionCert = new ClientAssertionCertificate(authenticationClientId, certificate);
// initializes configuration manager with key vault authentication and the secret cache default timespan
ConfigurationManager.Initialize(
new KeyVaultClient.AuthenticationCallback(
(authority, resource, scope) => GetAccessToken(authority, resource, scope, assertionCert)),
Constants.KeyVaultSecretCacheDefaultTimeSpan);
RoleEnvironment.Changed += RoleEnvironment_Changed;
}