My login module that I wrote is dropping URL params upon redirecting the user to their intended page.

For example:

• User tries to visit page test.asxp?a=1&b=2&c=3
• User isn't logged in so they are sent to the login page.  With a URL of ... ?returnurl=/test.asxp?a=1&b=2&c=3
• I then Response.Redirect(Convert.ToString(Request.QueryString["returnurl"]),true);
• The user ends up on the right page, but the B and C url params are lost

I sort of get what's happening.  The first url param should start off with "?" and all others should have "&", but how do I handle a return url with it's own params?

Thanks,

Greg