C# new X509Certificate2(path) PKCS#7/P7B -> System.Security.Cryptography.CryptographicException: 'Cannot find object or property'

Question

When trying to create a new certificate from a PKCS#7 ( .p7b )-file I get the following exception: System.Security.Cryptography.CryptographicException: 'Cannot find object or property'

I get the same error if I read from file or byte array. I can create X509Certificate2 with .pem or .p12 files this way without a problem. Why is this happening?

new X509Certificate2(path);
new X509Certificate2(byteArray);

Answer 1

we had a similar error and Cryp32's suggestion to use X509Certificate2Collection.Import method worked well. Please mark it as as valid solution to the issue if it worked in your case as well.