How do I pass response header to a redirect URL

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C#

How do i pass Response Header to a redirect URL

I have a Identity manager Solution where user tries to access a resource(URL:ex www.abc.com\Product) in Service provider(sp) and the SP will redirect the user to IDP(identity provider) whe user is authenticated the IDP sends assertion to SP. Upon receving the assertion my Client requires some of the attributes from the assertion to be added to the response header of the requested Resource(URL:ex www.abc.com\Product). The Problem is that since it is an ASP.net solution i cannot add the response header to the url, i.e after adding the header to the requested url the same is not available after redirecting to the same).

Kindly assist me on the same.

What I have tried:

Tired adding the name value in the Hidden vlaue of the post method but it was not feasible as of now