Thanks to: https://stackoverflow.com/a/60714907/9124424 I found a solution, but i still wonder why the code in my question does not work
So you need to add an IClientMessageInspector and an IEndpointBehavior
public class AddHttpHeaderMessageEndpointBehavior : IEndpointBehavior { private readonly IClientMessageInspector _httpHeaderMessageInspector; public AddHttpHeaderMessageEndpointBehavior(Dictionary<string, string> headers) { _httpHeaderMessageInspector = new HttpHeaderMessageInspector(headers); } public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters) { } public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime) { clientRuntime.ClientMessageInspectors.Add(_httpHeaderMessageInspector); } public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher) { } public void Validate(ServiceEndpoint endpoint) { } } public class HttpHeaderMessageInspector : IClientMessageInspector { private readonly Dictionary<string, string> _headers; public HttpHeaderMessageInspector(Dictionary<string, string> headers) { _headers = headers; } public void AfterReceiveReply(ref Message reply, object correlationState) { } public object BeforeSendRequest(ref Message request, IClientChannel channel) { if (request.Properties.Count == 0 || request.Properties[HttpRequestMessageProperty.Name] == null) { request.Properties.Add(HttpRequestMessageProperty.Name, new HttpRequestMessageProperty()); } var headersCollection = ((HttpRequestMessageProperty)request.Properties[HttpRequestMessageProperty.Name]).Headers; foreach (var header in _headers) headersCollection[header.Key] = header.Value; return null; } }
And then you can add this IEndpointBehavior to the Endpoint in the client instance
BasicHttpsBinding binding= new BasicHttpsBinding(); //for http //binding.Security.Mode = BasicHttpSecurityMode.TransportCredentialOnly; binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Basic; EndpointAddress endpoint = new EndpointAddress("https://hookb.in/..."); var soapClient = new RandomServiceClient(binding, endpoint); var headers = new Dictionary<string, string> { {"Authorization", $"Basic --INSERT TOKEN--"} })); var behavior = new AddHttpHeaderMessageEndpointBehavior(headers); soapClient.Endpoint.EndpointBehaviors.Add(behavior); soapClient.CallServiceMethod(new Request { Foo = "Bar" });
