gistfile1.txt

  app.SetDefaultSignInAsAuthenticationType(WsFederationAuthenticationDefaults.AuthenticationType);
  app.UseCookieAuthentication(
      new CookieAuthenticationOptions
      {
          AuthenticationType =
             WsFederationAuthenticationDefaults.AuthenticationType
      });
  app.UseWsFederationAuthentication(new WsFederationAuthenticationOptions
  {
      MetadataAddress = ...,
      Wtrealm = ...,
      Notifications = new WsFederationAuthenticationNotifications
      {
          AuthenticationFailed = context =>
          {
              context.HandleResponse();
              context.Response.Redirect("/Error?message=" + context.Exception.Message);
              return Task.FromResult(0);
          },

          SecurityTokenValidated = context =>
          {
              if (HttpContext.Current != null)
              {
                  WriteTokenExipreTime(context.AuthenticationTicket.Properties.ExpiresUtc);
                  
                  // Login here
                  // Map claims
                  
              }
              return Task.FromResult(0);
          },

      }

  });