Got the answer:
http://blog.andrei.rinea.ro/post/200...-entities.aspx
"Holger Seemüller" <(E-Mail Removed)> schrieb im
Newsbeitrag news:%(E-Mail Removed)...
> Short addition: I am using Silverlight 3 to consume the service!
>
> "Holger Seemüller" <(E-Mail Removed)> schrieb im
> Newsbeitrag news:eJe8%(E-Mail Removed)...
>> Hi everyone,
>>
>> I am working with these ADO.NET Data Services for the first time and
>> although they look very usable for my task, there is something confusing
>> me: Is there no possibility to make a synchron query to the service, e.g.
>> something like this:
>>
>> List<bar> ret = new List<bar>();
>> var query = from foo in context.bar
>> select foo;
>> ret = query.ToList();
>>
>> If I try it that way, I get a NotSupportedException in the last line
>> ("The specified method is not supported" - or something like that, I have
>> got only the german version...). Nevertheless, in the internet there are
>> quite a lot of examples, telling me, that this should work...
>>
>> Or is it obligatory to cast the query to an DataServiceQuery and execute
>> it asynchronously via query.BeginExecute(...)?
>>
>>
>> Greetings,
>> Holger
>>
>