/// <summary>
/// Begin get publications file (async).
/// Sends the request to all the sub-services in parallel. First successful response is used. Request fails only if all the sub-services fail.
/// </summary>
/// <param name="callback">callback when publications file is downloaded</param>
/// <param name="asyncState">callback async state object</param>
/// <returns>async result</returns>
public IAsyncResult BeginGetPublicationsFile(AsyncCallback callback, object asyncState)
{
if (PublicationsFileService == null)
{
throw new HAKsiServiceException("Publications file service is missing.");
}
return(PublicationsFileService.BeginGetPublicationsFile(callback, asyncState));
}