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Create a new instance of the CipherData class using CipherReference information

using System; using System.Security.Cryptography.Xml; using System.Xml; using System.IO;     class Sample1     {         [STAThread]         static void Main(string[] args)         {             String uri = "http://www.yourdomain.com/document.xml";             Transform base64 = new XmlDsigBase64Transform();             TransformChain tc = new TransformChain();             tc.Add(base64);             CipherReference reference = new CipherReference(uri, tc);             CipherData cd = new CipherData(reference);             EncryptedData ed = new EncryptedData();             ed.Id = "ED";             ed.EncryptionMethod = new EncryptionMethod("http://www.w3.org/2001/04/xmlenc#aes128-cbc");             ed.CipherData = cd;             KeyInfo ki = new KeyInfo();             ki.AddClause(new KeyInfoRetrievalMethod("#EK", "http://www.w3.org/2001/04/xmlenc#EncryptedKey"));             ed.KeyInfo = ki;             XmlDocument doc = new XmlDocument();             XmlElement encryptionPropertyElement = (XmlElement)doc.CreateElement("EncryptionProperty", EncryptedXml.XmlEncNamespaceUrl);             EncryptionProperty ep = new EncryptionProperty(encryptionPropertyElement);             ed.AddProperty(ep);             try{                 string path = @"c:\MyTest.xml";                 File.WriteAllText(path, ed.GetXml().OuterXml);             }             catch (IOException e)             {                 Console.WriteLine("File IO error. {0}", e);             }         }     }