public static class Extensions
    {
        public static string GetOutgoingCookies(this OperationContext context)
        {
            var props = context.IncomingMessageProperties;
            var prop = props[HttpResponseMessageProperty.Name] as HttpResponseMessageProperty;
            var cookies = prop.Headers[HttpResponseHeader.SetCookie];
            return ConstructCookies(cookies);
        }

        public static void SetOutgoingCookies(this OperationContext context, string cookies)
        {
            var prop = new HttpRequestMessageProperty();
            prop.Headers.Add(HttpRequestHeader.Cookie, cookies);
            context.OutgoingMessageProperties[HttpRequestMessageProperty.Name] = prop;
        }

        private static string ConstructCookies(string incomingCookies)
        {
            var cookies = incomingCookies.Split(new char[] { ',', ';' });
            StringBuilder buffer = new StringBuilder(incomingCookies.Length * 10);
            foreach (var entry in cookies)
            {
                if (entry.IndexOf("=") > 0 && !entry.Trim().StartsWith("path") && !entry.Trim().StartsWith("expires"))
                {
                    buffer.Append(entry).Append("; ");
                }
            }
            if (buffer.Length > 0)
            {
                buffer.Remove(buffer.Length - 2, 2);
            }
            return buffer.ToString();
        }
    }