How do i check the client browser SSL certificate in my ASP.net code behind
I want to ensure that if any https proxy like fiddler is running then my application does not load
I have done the following till now without any success:
My site is on Https
In IIS i have set 
Require SSL= true
Require 128 bit encryption =true
accept certificate = true

in my default.aspx Page\_Load i am trying to read the value of Request.ClientCertificate, the collection is coming as empty.