I'm signing my documents using DSACrypto and RSACrypto service providers. Unfortunately mentalis.org Certificate class implementation is limited to RSA, it would be great if it returned AssymetricAlgorithm class instead of fixed "RSA" class.

For compatibility reasons, we used the same API Microsoft is using in the 'Web Service Enhancements' library. However I agree that an AsymmetricAlgorithm would have been cleaner. I don't know why they didn't do this in the first place...