IServerChannelSink Interface


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Provides methods used for security and transport sinks.

Namespace:   System.Runtime.Remoting.Channels
Assembly:  mscorlib (in mscorlib.dll)

public interface IServerChannelSink : IChannelSinkBase


Gets the next server channel sink in the server sink chain.


Gets a dictionary through which properties on the sink can be accessed.(Inherited from IChannelSinkBase.)

System_CAPS_pubmethodAsyncProcessResponse(IServerResponseChannelSinkStack, Object, IMessage, ITransportHeaders, Stream)

Requests processing from the current sink of the response from a method call sent asynchronously.

System_CAPS_pubmethodGetResponseStream(IServerResponseChannelSinkStack, Object, IMessage, ITransportHeaders)

Returns the Stream onto which the provided response message is to be serialized.

System_CAPS_pubmethodProcessMessage(IServerChannelSinkStack, IMessage, ITransportHeaders, Stream, IMessage, ITransportHeaders, Stream)

Requests message processing from the current sink.

Channel sinks provide a plug-in point that allows access to the underlying messages flowing through the channel as well as the stream used by the transport mechanism to send messages to a remote object. Channel sinks are linked together in a chain of channel sink providers, and all channel messages flow through this chain of sinks before the message is serialized and transported.

The following code example illustrates an implementation of the IServerChannelSink interface.

using System;
using System.Collections;
using System.IO;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Messaging;
using System.Security.Permissions;

public class ServerSink : BaseChannelSinkWithProperties, IServerChannelSink

    // This class inherits from BaseChannelSinkWithPropertes
    // to get an implementation of IChannelSinkBase.

    // The next sink in the chain.
    private IServerChannelSink nextSink;

    public IServerChannelSink NextChannelSink
        [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.Infrastructure)]

    [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.Infrastructure)]
    public Stream GetResponseStream (IServerResponseChannelSinkStack sinkStack,
                                     Object state,
                                     IMessage message,
                                     ITransportHeaders responseHeaders)

    [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.Infrastructure)]
    public ServerProcessing ProcessMessage (IServerChannelSinkStack sinkStack,
                                            IMessage requestMessage,
                                            ITransportHeaders requestHeaders,
                                            Stream requestStream,
                                            out IMessage responseMessage,
                                            out ITransportHeaders responseHeaders,
                                            out Stream responseStream)

        // Hand off to the next sink for processing.
        sinkStack.Push(this, null);
        ServerProcessing status = nextSink.ProcessMessage(
          sinkStack, requestMessage, requestHeaders, requestStream,
          out responseMessage, out responseHeaders, out responseStream

        // Print the response message properties.
        Console.WriteLine("---- Message from the server ----");
        IDictionary dictionary = responseMessage.Properties;
        foreach (Object key in dictionary.Keys)
            Console.WriteLine("{0} = {1}", key, dictionary[key]);


    [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.Infrastructure)]
    public void AsyncProcessResponse (IServerResponseChannelSinkStack sinkStack,
                                      Object state,
                                      IMessage message,
                                      ITransportHeaders responseHeaders,
                                      Stream responseStream)
        throw new NotImplementedException();

    // Constructor
    public ServerSink (IServerChannelSink sink) {
      if (sink == null) throw new ArgumentNullException("sink");
      nextSink = sink;


See the IServerChannelSinkProvider interface documentation for an example of the corresponding server sink provider implementation.


for operating with infrastructure code. Demand value: SecurityAction.LinkDemand; Permission value: SecurityPermissionFlag.Infrastructure

.NET Framework
Available since 1.1
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