public void untagAll(string authenticationToken, string guid)
{
#if !SILVERLIGHT && !NETFX_CORE
send_untagAll(authenticationToken, guid);
recv_untagAll();
#else
var asyncResult = Begin_untagAll(null, null, authenticationToken, guid);
End_untagAll(asyncResult);
#endif
}
#if SILVERLIGHT || NETFX_CORE