>From your Prepare snippet, looks like the model for the client code is
still callback based.

How about using a BeginInvoke extension method?

proxy
        .BeginInvoke(p => p.GetSize(str))
        .EndInvoke(size => Write(size));

This calling pattern sets up some context for your proxy/interceptor
directing it to call BeginGetSize instead of GetSize.

The client then can control if the call is going to be synchronous or
asynchronous based on its need.

You might find a coroutine approach such as F# async or my
http://www.codeplex.com/EasyAsync interesting too.

Cheers

Ajai

On May 6, 2:47 pm, Krzysztof Koźmic <[email protected]>
wrote:
> I'm working on adding to WCF Facility support for async calls from
> client side (similar to what can be done with SvcUtil-generated
> proxies), when using channelfactory and intereface contract only.
> Something like What Ayende wrote about 
> here:http://ayende.com/Blog/archive/2008/03/29/WCF-Async-without-proxies.aspx
> but without having to write IAsyncBus
>
> I have very rough (but working) implementation.
>
> But...
>
> given we don't have an actual async methods to call, we have to have an
> alternative syntax (well, at least until C# 4.0 and IDynamicObject, but
> that's another story)http://paste2.org/p/198506here's what I came up with.
> I encourage you to discussion about it. If you have alternative, better
> ideas, you can show it here:http://paste2.org/followup/198506
>
> Thanks,
>
> Krzysztof

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