WCF:为什么在远程端点中传递失败？

显然你必须传入一个空的SpnEndpointIdentity才能使它工作.

    Using con As New OfferingTap.OfferingTapClient( _ 
        New ServiceModel.InstanceContext(callback), "NetTcpBinding_IOfferingTap", _
        New ServiceModel.EndpointAddress(New Uri("net.tcp://qa1offerings:8190/"), _
        New ServiceModel.SpnEndpointIdentity("")))