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Basic formatting applied. Unnecessary comments have been removed. Suspicious code is covered by TODO.

Hcs.Client/Microsoft/Xades/IssuerSerial.cs

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+// IssuerSerial.cs
+//
+// XAdES Starter Kit for Microsoft .NET 3.5 (and above)
+// 2010 Microsoft France
+// Published under the CECILL-B Free Software license agreement.
+// (http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.txt)
+// 
+// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, 
+// WHETHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED 
+// WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE. 
+// THE ENTIRE RISK OF USE OR RESULTS IN CONNECTION WITH THE USE OF THIS CODE 
+// AND INFORMATION REMAINS WITH THE USER.
+
+using System;
+using System.Security.Cryptography;
+using System.Security.Cryptography.Xml;
+using System.Xml;
+
+namespace Microsoft.Xades
+{
+    /// <summary>
+    /// The element IssuerSerial contains the identifier of one of the
+    /// certificates referenced in the sequence
+    /// </summary>
+    public class IssuerSerial
+    {
+        #region Private variables
+        private string x509IssuerName;
+        private string x509SerialNumber;
+        #endregion
+
+        #region Public properties
+        /// <summary>
+        /// Name of the X509 certificate issuer
+        /// </summary>
+        public string X509IssuerName
+        {
+            get
+            {
+                return this.x509IssuerName;
+            }
+            set
+            {
+                this.x509IssuerName = value;
+            }
+        }
+
+        /// <summary>
+        /// Serial number of the X509 certificate
+        /// </summary>
+        public string X509SerialNumber
+        {
+            get
+            {
+                return this.x509SerialNumber;
+            }
+            set
+            {
+                this.x509SerialNumber = value;
+            }
+        }
+        #endregion
+
+        #region Constructors
+        /// <summary>
+        /// Default constructor
+        /// </summary>
+        public IssuerSerial()
+        {
+        }
+        #endregion
+
+        #region Public methods
+        /// <summary>
+        /// Check to see if something has changed in this instance and needs to be serialized
+        /// </summary>
+        /// <returns>Flag indicating if a member needs serialization</returns>
+        public bool HasChanged()
+        {
+            bool retVal = false;
+
+            if (!String.IsNullOrEmpty(this.x509IssuerName))
+            {
+                retVal = true;
+            }
+
+            if (!String.IsNullOrEmpty(this.x509SerialNumber))
+            {
+                retVal = true;
+            }
+
+            return retVal;
+        }
+
+        /// <summary>
+        /// Load state from an XML element
+        /// </summary>
+        /// <param name="xmlElement">XML element containing new state</param>
+        public void LoadXml(System.Xml.XmlElement xmlElement)
+        {
+            XmlNamespaceManager xmlNamespaceManager;
+            XmlNodeList xmlNodeList;
+
+            if (xmlElement == null)
+            {
+                throw new ArgumentNullException("xmlElement");
+            }
+
+            xmlNamespaceManager = new XmlNamespaceManager(xmlElement.OwnerDocument.NameTable);
+            xmlNamespaceManager.AddNamespace("ds", SignedXml.XmlDsigNamespaceUrl);
+
+            xmlNodeList = xmlElement.SelectNodes("ds:X509IssuerName", xmlNamespaceManager);
+            if (xmlNodeList.Count == 0)
+            {
+                throw new CryptographicException("X509IssuerName missing");
+            }
+            this.x509IssuerName = xmlNodeList.Item(0).InnerText;
+
+            xmlNodeList = xmlElement.SelectNodes("ds:X509SerialNumber", xmlNamespaceManager);
+            if (xmlNodeList.Count == 0)
+            {
+                throw new CryptographicException("X509SerialNumber missing");
+            }
+            this.x509SerialNumber = xmlNodeList.Item(0).InnerText;
+        }
+
+        /// <summary>
+        /// Returns the XML representation of the this object
+        /// </summary>
+        /// <returns>XML element containing the state of this object</returns>
+        public XmlElement GetXml()
+        {
+            XmlDocument creationXmlDocument;
+            XmlElement retVal;
+            XmlElement bufferXmlElement;
+
+            creationXmlDocument = new XmlDocument();
+            retVal = creationXmlDocument.CreateElement("xades", "IssuerSerial", XadesSignedXml.XadesNamespaceUri);
+
+            bufferXmlElement = creationXmlDocument.CreateElement("ds", "X509IssuerName", SignedXml.XmlDsigNamespaceUrl);
+            bufferXmlElement.InnerText = this.x509IssuerName;
+            retVal.AppendChild(bufferXmlElement);
+
+            bufferXmlElement = creationXmlDocument.CreateElement("ds", "X509SerialNumber", SignedXml.XmlDsigNamespaceUrl);
+            bufferXmlElement.InnerText = this.x509SerialNumber;
+            retVal.AppendChild(bufferXmlElement);
+
+            return retVal;
+        }
+        #endregion
+    }
+}