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copied!<p>You can use AuthHeader as you did before switching to WCF. Maybe it will be more convinient for you, cause the princples will remain the same. The bad thing i see in this solution is a plain text password transfer. Anyway, it's just another option and you can encrypt/decrypt the password somehow.</p> <p>In this case you should implement your own your IDispatchMessageInspector & IClientMessageInspector, like</p> <pre><code>[AttributeUsage(AttributeTargets.Class)] public class CredentialsExtractorBehaviorAttribute : Attribute, IContractBehavior, IDispatchMessageInspector { #region IContractBehavior implementation. public void ApplyDispatchBehavior(ContractDescription contractDescription, ServiceEndpoint endpoint, DispatchRuntime dispatchRuntime) { dispatchRuntime.MessageInspectors.Add(this); } ... empty interface methods impl skipped ... #endregion #region IDispatchMessageInspector implementation. public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext) { int i = request.Headers.FindHeader("username", "sec"); if (-1 != i) { string username = request.Headers.GetHeader<string>("username", "sec"); ... do smth ... } return null; } public void BeforeSendReply(ref Message reply, object correlationState) { return; } #endregion } </code></pre> <p>In a sample i placed to header only username, but you can implement your a class containing username and password and use it instead of string. On the client:</p> <pre><code>internal class CredentialsInserter : IContractBehavior, IClientMessageInspector { private string m_username; public CredentialsInserter(string username) { m_username = username; } #region IContractBehavior implementation. ... empty interface methods impl skipped ... public void ApplyClientBehavior(ContractDescription contractDescription, ServiceEndpoint endpoint, ClientRuntime clientRuntime) { clientRuntime.MessageInspectors.Add(this); } #endregion #region IClientMessageInspector implementation. public object BeforeSendRequest(ref Message request, IClientChannel channel) { MessageHeader<string> mh = new MessageHeader<string>(m_username); request.Headers.Add(mh.GetUntypedHeader("username", "sec")); return null; } public void AfterReceiveReply(ref Message reply, object correlationState) { return; } #endregion } </code></pre> <p>Then you should place attribute CredentialsExtractorBehaviorAttribute on your service implementation class.</p> <pre><code>[CredentialsExtractorBehavior] public class DummyService : IDummyService { ... impl ... } </code></pre> <p>And on the client side you should do the following:</p> <pre><code> using (DummyServiceClient c = new DummyServiceClient("TcpEndpoint")) { c.ChannelFactory.Endpoint.Contract.Behaviors.Add( new CredentialsInserter("_username_")); c.DummyMethod(); } </code></pre>

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