asp.net mvc - Specify QueryString Parameters in redirect_uri -


i have implemented signup facebook functionality, working fine, have specify parameter in redirect_uri, have specified when accessing fb, giving error:

(oauthexception) error validating verification code. please make sure redirect_uri identical 1 used in oauth dialog request

if redirect_uri 

http://localhost:5000/signup/fboauth

it works fine,but when specify parameter this(this parameter can have null value)

http://localhost:5000/signup/fboauth?checkout=

or

http://localhost:5000/signup/fboauth?checkout=

it starts giving error, possible specify parameters in redirect_uri? have read on facebook developer's site bug, here


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