这是调用webservices的一个异常：
The CLR has been unable to transition from COM context 0x1b1b90 to COM context 0x1b1d00
for 60 seconds. The thread that owns the destination context/apartment is most likely
either doing a non pumping wait or processing a very long running operation without
pumping Windows messages. This situation generally has a negative performance impact
and may even lead to the application becoming non responsive or memory usage
accumulating continually over time. To avoid this problem, all single threaded
apartment (STA) threads should use pumping wait primitives (such as
CoWaitForMultipleHandles) and routinely pump messages during long running operations.
不知道怎么解决啊！要用多线程去做回掉处理吗？
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