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May 04, 2007 05:06 PM|LINK
Please show what you're doing in 'CallAllMethods' - why does that return before all WebService calls are finished? Do you issue 12 async calls in parallell and then just return? If so, there are many ways to synchronize and wait for them to all finish -
the most obvious simply waiting for all the WaitHandles in the IAsyncResults from the async calls. If they're called synchronlously something else than what you think is actually causing the error.
By the way - if you're calling 12 web services in one request, you should really, really consider running your page in async mode.