public partial class Startup
{
    public void ConfigureAuth(IAppBuilder app)
    {
        app.UseCookieAuthentication(new CookieAuthenticationOptions
        {
            AuthenticationType = "Cookies"
        });

        app.UseOpenIdConnectAuthentication(new OpenIdConnectAuthenticationOptions
        {
            Authority = ConfigurationManager.AppSettings["id:Authority"],
            Scope = "openid profile",
            ClientId = ConfigurationManager.AppSettings["id:ClientId"],
            RedirectUri = ConfigurationManager.AppSettings["id:RedirectUri"],
            ResponseType = "id_token",
            SignInAsAuthenticationType = "Cookies",
        });

         app.UseStageMarker(PipelineStage.Authenticate);
    }

protected void Page_Load(object sender, EventArgs e)
 {
    // Send an OpenID Connect sign-in request.
    if (!System.Web.HttpContext.Current.Request.IsAuthenticated)
    {
      HttpContext.Current.GetOwinContext().Authentication.Challenge(new AuthenticationProperties { RedirectUri = "/" }, OpenIdConnectAuthenticationDefaults.AuthenticationType);
    }

 }