/// <summary>
/// Add all the namespaces and their prefixes declared in a given <see cref="TransformBase"/>-derived the XSLT transform.
/// </summary>
/// <typeparam name="TTransform">
/// The <see cref="TransformBase"/>-derived XSLT transform to get the namespaces to declare from.
/// </typeparam>
/// <param name="xmlNamespaceManager">
/// The <see cref="XmlNamespaceManager"/> to which to add the namespace declared in the given <typeparamref name="TTransform"/> <see cref="TransformBase"/> transform.
/// </param>
/// <returns>
/// The <see cref="XmlNamespaceManager"/> to which the namespace declarations have been added.
/// </returns>
public static XmlNamespaceManager AddNamespaces <TTransform>(this XmlNamespaceManager xmlNamespaceManager)
where TTransform : TransformBase, new()
{
using (var sr = new StringReader(new TTransform().XmlContent))
{
var navigator = new XPathDocument(sr).CreateNavigator();
navigator.MoveToFollowing(XPathNodeType.Element);
navigator.GetNamespacesInScope(XmlNamespaceScope.All).Each(n => xmlNamespaceManager.AddNamespace(n.Key, n.Value));
}
return(xmlNamespaceManager);
}
