QueryTask - Finding Attribute field types

[PaulLeedham]

I would like to know if there is a more elegant way of finding the attribute field types when using a QueryTask.  The problem we are having is that if the feature layer is dynamic, we do not know the field types within the layer on the server--we basically have to return all 500 records with a query such as SELECT * From Dataset Where OBJECTID > 0.  Is there a method where we can SELECT Top 1 from dataset, or something similar?
Thanks,

[JenniferNery]

The REST API does not support this type of query. Only the following parameters may be provided (even for 10.01) http://services.arcgisonline.com/ArcGIS/SDK/REST/query.html.

You would have to use LINQ query to narrow the results in the ExecuteCompleted or simply retrieve the first feature and ignore the rest of the results.