/// <summary>
/// Gets the annotation elements for a <see cref="XAttribute"/>.
/// </summary>
/// <param name="attribute"></param>
/// <returns></returns>
IEnumerable<XElement> SerializeAttributes(XAttribute attribute)
{
Contract.Requires<ArgumentNullException>(attribute != null);
// skip namespace attribute
if (attribute.IsNamespaceDeclaration)
yield break;
// emit annotations on the attribute
foreach (var annotation in attribute.Annotations<object>())
{
var obj = SerializeAnnotation(attribute, annotation);
if (obj != null)
{
obj.SetAttributeValue(NX_FOR, NX_FOR_ATTRIBUTE);
yield return obj;
}
}
}
