在.NET Core中添加自定义WCF行为

Question

我需要移动旧的.net标准行为，将requestContext添加到标头中。NET核心

protected override ServiceClient<TService> CreateClient()
        {
            return new ServiceClient<TService>(
                this.EndPointName, new ClientContextBehavior<TContext>(this.ClientContextProvider.GetClientContext()));
        }
public class ClientContextBehavior<TContextData> : BehaviorExtensionElement, IEndpointBehavior
        where TContextData : class
    {
        /// <summary>The client context.</summary>
        private readonly TContextData clientContext;

        /// <summary>Initializes a new instance of the ClientContextBehavior class.</summary>
        public ClientContextBehavior()
        {
        }

        /// <summary>Initializes a new instance of the ClientContextBehavior class.</summary>
        /// <param name="clientContext">Context for the client.</param>
        public ClientContextBehavior(TContextData clientContext)
        {
            this.clientContext = clientContext;
        }

        /// <summary>Gets a context for the client.</summary>
        /// <value>The client context.</value>
        public TContextData ClientContext
        {
            get { return this.clientContext; }
        }

        /// <summary>Gets the type of behavior.</summary>
        /// <value>A <see cref="T:System.Type" />.</value>
        public override Type BehaviorType
       {
            get { return typeof(ClientContextBehavior<TContextData>); }
        }

        #region IEndpointBehavior Members

        /// <summary>Implement to pass data at runtime to bindings to support custom behavior.</summary>
        /// <param name="endpoint">         The endpoint to modify.</param>
        /// <param name="bindingParameters">
        /// The objects that binding elements require to support the behavior.
        /// </param>
        void IEndpointBehavior.AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
        {
        }

        /// <summary>Implements a modification or extension of the client across an endpoint.</summary>
        /// <param name="endpoint">     The endpoint that is to be customized.</param>
        /// <param name="clientRuntime">The client runtime to be customized.</param>
        /// <exception cref="ArgumentNullException">Is thrown when <paramref name="clientRuntime"/> is <c>null</c>.</exception>
        void IEndpointBehavior.ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
        {
            if (clientRuntime == null)
            {
                throw new ArgumentNullException("clientRuntime");
            }

            ClientContextMessageInspector<TContextData> inspector = new ClientContextMessageInspector<TContextData>(this.clientContext);
            clientRuntime.MessageInspectors.Add(inspector);
        }

        /// <summary>Implements a modification or extension of the service across an endpoint.</summary>
        /// <exception cref="ArgumentNullException">
        /// Is thrown when <paramref name="endpointDispatcher"/> is <c>null</c>.
        /// </exception>
        /// <param name="endpoint">The endpoint that exposes the contract.</param>
        /// <param name="endpointDispatcher">The endpoint dispatcher to be modified or extended.</param>
        void IEndpointBehavior.ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
        {
        }

        /// <summary>Implement to confirm that the endpoint meets some intended criteria.</summary>
        /// <param name="endpoint">The endpoint to validate.</param>
        void IEndpointBehavior.Validate(ServiceEndpoint endpoint)
        {
        }

        #endregion

        /// <summary>Creates a behavior extension based on the current configuration settings.</summary>
        /// <exception cref="NotImplementedException">
        /// Thrown when the requested operation is unimplemented.
        /// </exception>
        /// <returns>The behavior extension.</returns>
        protected override object CreateBehavior()
        {
            return new ClientContextBehavior<TContextData>(this.clientContext);
        }
    }

但我找不到BehaviorExtensionElement