First, let me say, this is a great product!

Now to the issue. After banging my head in the wall and opening a case at Microsoft, I found the source to my problem. I have a certificate with a private key that is stored in a CSP other than the default one. When decrypting data, it fails.

We've traced the issue to the following line (line 1102 in Certificate.cs):
cspParams.ProviderName = null; //provInfo.pwszProvName;

Is there a good reason the ProviderName is set to null? Setting it to pwszProvName solves my issue. Will you include this fix in the next release?

Also, how do I build a signed DLL? I can't find the key pair needed for signing the DLL.