如何像<ns:From><ns:Address>###</ns:Address></ns:From>一样添加SOAP标头C#

using System;
using System.ServiceModel;
using System.ServiceModel.Channels;

namespace SOAPHeaderExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // 创建一个SOAP消息
            Message message = Message.CreateMessage(MessageVersion.Soap11, "Action");

            // 创建一个自定义的SOAP标头
            MessageHeader header = MessageHeader.CreateHeader("From", "Namespace", "###");

            // 将自定义的SOAP标头添加到SOAP消息的标头集合中
            message.Headers.Add(header);

            // 创建一个用于发送SOAP消息的通道
            ChannelFactory<IMyService> factory = new ChannelFactory<IMyService>(new BasicHttpBinding(), new EndpointAddress("http://example.com/MyService"));
            IMyService client = factory.CreateChannel();

            // 发送带有自定义SOAP标头的SOAP消息
            client.MyMethod(message);

            // 关闭通道工厂
            factory.Close();
        }
    }

    [ServiceContract]
    public interface IMyService
    {
        [OperationContract]
        void MyMethod(Message message);
    }
}