Message in Chinese (Traditional) (中文（繁體）)
為了使用具有 DuplexChannelFactory 的合約 '<var>Contract Name</var>'，合約必須指定有效的回呼合約。若您的合約沒有回呼合約，請考慮使用 ChannelFactory 來取代 DuplexChannelFactory。
Unlocalized message
In order to use the contract '<var>Contract Name</var>' with DuplexChannelFactory, the contract must specify a valid callback contract. If your contract does not have a callback contract, consider using ChannelFactory instead of DuplexChannelFactory.
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