### Is your feature request related to a problem? Please describe... I don't think there is a way to addObject to SignedXml instance. Would be nice to add this functionality. Currently missing it myself. ### Describe teh solution you'd like... (new SignedXml()).AddObject(xmlString) would be easy to use this functionality. ### Describe the alternatives you've considered... I don't think there is any other alternative to addobject in signature xml currently.