Assembly: System.Security (in system.security.dll)
Property ValueA CryptographicAttributeCollection collection that represents the signed attributes. If there are no signed attributes, the property is an empty collection.
An example of a signed attribute that might be included in the CryptographicAttributeCollection collection retrieved by the SignedAttributes property is the Pkcs9SigningTime signing time attribute.
Signed attributes are signed along with the rest of the SignedCms message content. This means that a party that successfully verifies the signature can have confidence that the contents of these attributes are authentic and have not been altered.
A Pkcs9ContentType object and a Pkcs9MessageDigest object will be automatically generated and placed in the SignedAttributes property whenever the CmsSigner.SignedAttributes property for the corresponding signer is not empty.
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.