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XmlDsigEnvelopedSignatureTransform Class

Represents the enveloped signature transform for an XML digital signature as defined by the W3C.

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

public class XmlDsigEnvelopedSignatureTransform extends Transform

The XmlDsigEnvelopedSignatureTransform class removes the <Signature> element from an XML document before the digest is computed. With this transform, you can sign and verify all elements of an XML document except the XML digital signature elements.

Although you can create and insert a signature into an XML document, verifying the modified document using the embedded signature will fail because the document now has additional elements. This transform removes the <Signature> element and allows you to verify the document using its original form.

Use the XmlDsigEnvelopedSignatureTransform class whenever you create an enveloped signature.

For more information about the enveloped signature transform, see Section 6.6.4 of the XMLDSIG specification, which is available from the W3C at

This section contains two code examples. The first example demonstrates how to sign an XML file using an envelope signature. The second example demonstrates how to use members of the XmlDsigEnvelopedSignatureTransform class.

Example #1

No code example is currently available or this language may not be supported.

Example #2

No code example is currently available or this language may not be supported.


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 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0