SignedInfo Class

Contains information about the canonicalization algorithm and signature algorithm used for the XML signature.

Namespace: System.Security.Cryptography.Xml
Assembly: System.Security (in

public class SignedInfo : ICollection, IEnumerable
public class SignedInfo implements ICollection, IEnumerable
public class SignedInfo implements ICollection, IEnumerable
Not applicable.

The SignedInfo class represents the <SignedInfo> element of an XML signature defined by the XML digital signature specification. The <SignedInfo> element, which is a subelement of the <Signature> element, contains the canonicalization method used for signing, the algorithm used for signing and validation, and references that describe a digital signature.

For most scenarios, you should use the SignedInfo class available from the SignedInfo property to sign and verify XML digital signatures.

For more information about the <SignedInfo> element, see the World Wide Web Consortium (W3C) specification at


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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 Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

Community Additions