string sendPortName = inmsg.Context.Read("SPName", "http://schemas.microsoft.com/BizTalk/2003/system-properties") as string;
而不是ReceivePortName:)
而不是ReceivePortName:)
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string sendPortName = inmsg.Context.Read("SPName", "http://schemas.microsoft.com/BizTalk/2003/system-properties") as string; 
而不是ReceivePortName:)  
                
            
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