Loading X509Certificate results in exception CryptographicException “Cannot find the original signer”

Question

I am trying to instantiate an X509Certificate object, but I keep running into the same CryptographicException, with the error message:

Answer 1

I figured out the problem. I was attempting to load just the certificate file, which did not include the private key. To fix the problem, I had to install the private key on the machine on which the certificate was purchased, and then export it as a .pfx file and move it to where I actually wanted to use it. I'm sure was a newbie mistake. Hopefully, my silly issue will help other newbies in the future.