Adds a System.Security.Cryptography.Xml.Transform object to the list of transforms to be performed on the data before passing it to the digest algorithm.
The Reference.AddTransform(Transform) method modifies the <Transform> element and associated subelements of an XML digital signature.
Transforms are applied in the order in which they were added. If no transforms are specified, the minimum required transforms are added automatically.
For more information about XML digital signatures, see the W3C specification at www.w3.org/TR/xmldsig-core/.