///<summary>
///the name of the Value xml node.
///</summary>
protected const string cValueXmlAttributeName="Value";
///<summary>
///Retrieves the value of the specified tag xml node.
///</summary>
protected string GetXmlNodeValue(XmlNode node)
{
if(node==null)
{
throw new ArgumentNulException("Node");
}
XmlAttribute myValueXmlAttribute=node.Attributes[cTagValueXmlAttributename];
if(myValueXmlAttribute==null)
{
return null;
}
return myValueXmlAttribute.Value;
}