/// <summary>
/// Get the XML for a version of an item
/// </summary>
/// <param name="item"></param>
/// <param name="versionQuery"></param>
/// <returns></returns>
private string GetXml(ContentItem item, string versionQuery)
{
int index;
int.TryParse(versionQuery, out index);
var ver = _versionRepository.GetVersion(item, index);
return(ver != null ? ver.VersionDataXml : _versionRepository.Serialize(item));
}