More than once I have come across the issue where we have had a problem using an X509Cert from the certificate store. Everything is configured properly in the certificate store but when we attempt to create the signature we end up with a cryptographic exception for no apparent reason. See CryptographicException: The handle is invalid post by Benoit Martin explains the problem and shows how this issue can be resolved. Technorati Tags: Exceptions,Help,Cryptography...
Technorati Tags: Exceptions Today I had an issue where a .NET 2.0 app logged this exception for me. The customer had recently ran Windows Update and applied various patches to their XP installation. I did a quick search and came across this thread [^] which lead me to doing a repair on the .NET Framework 3.5 SP1 installation. The customer’s machine actually had .NET 3.5 SP 1, .NET 2.0 SP2 and .NET 1.1 (not sure of the sp level) installed. After I did the repair I no longer received the FileNotFoundException...