System.Security 2.0.0.0 4.0.0.0 System.Security.Cryptography.Pkcs.Pkcs9AttributeObject To be added. The class defines the description of the content of a CMS/PKCS #7 message. Constructor 2.0.0.0 4.0.0.0 To be added. The constructor creates an instance of the class. Constructor 2.0.0.0 4.0.0.0 To be added. The constructor creates an instance of the class by using the specified array of byte values as the encoded description of the content of a CMS/PKCS #7 message. An array of byte values that specifies the encoded description of the CMS/PKCS #7 message. Constructor 2.0.0.0 4.0.0.0 To be added. The constructor creates an instance of the class by using the specified description of the content of a CMS/PKCS #7 message. An instance of the class that specifies the description for the CMS/PKCS #7 message. Method 2.0.0.0 4.0.0.0 System.Void This method replaces the current object with the specified object. Copies information from an object. The object from which to copy information. Property 2.0.0.0 4.0.0.0 System.String To be added. To be added. The property retrieves the document description.