Represents the Uniform Resource Identifier (URI) for the base 64 transformation. This field is constant.
The value of the SignedXml.XmlDsigBase64TransformUrl field is "http://www.w3.org/2000/09/xmldsig#base64".
Use this field to conveniently supply a value to one of the URI attributes of an element used for XMLDSIG.
The System.Security.Cryptography.Xml.XmlDsigBase64Transform class implements the transform described by the SignedXml.XmlDsigBase64TransformUrl field.
For more information, see the World Wide Web Consortium (W3C) specification at http://www.w3.org/2000/09/xmldsig#base64.