How to passing custom parameters to op

[kagaw...@tis.co.jp]

Hello everyone,

We developed original openid op site.

Now, we want to pass custom parameters to our original op endpoint using DotNetOpenAuth,

and customize behavior op site. But we don't know how to do that.

      var request = openid.CreateRequest(

          "https://op.example.com/discovery", realmUriBld.Uri, new Uri("http://rp.example.com/login"));

      // ????? pass custom parameters ?????

      request.RedirectToProvider();

Please guide me.