近期在开发一个项目需要使用结合微信公众号，于是使用了盛派的微信开发工具包。

参考了这篇文章：
https://www.cnblogs.com/szw/p/Wechat-MessageHandler-Middleware.html
Senparc.Weixin.MP SDK 微信公众平台开发教程（二十三）：在 .NET Core 2.0/3.0 中使用 MessageHandler 中间件

使用中间件来响应微信公众号的消息 处理。
在startup.cs配置如下：

public void ConfigureServices(IServiceCollection services)
{

services.AddSenparcWeixinServices(Configuration);//Senparc.Weixin 注册
｝

configure中添加使用中间件：

app.UseMessageHandlerForMp("/WeixinAsync", CustomMpMessageHandler.GenerateMessageHandler, o => o.AccountSettingFunc = c => senparcWeixinSetting.Value);

继承消息处理事件代码如下：

using Microsoft.Extensions.Logging;
using NLog;
using Senparc.NeuChar.App.AppStore;
using Senparc.NeuChar.Entities;
using Senparc.Weixin.MP.Entities;
using Senparc.Weixin.MP.Entities.Request;
using Senparc.Weixin.MP.MessageContexts;
using System;
using System.IO;

namespace NetCoreTFCMS.Common
{

/// <summary>
/// 自定义公众号消息处理
/// </summary>
public class CustomMpMessageHandler : Senparc.Weixin.MP.MessageHandlers.MessageHandler<DefaultMpMessageContext>
{

    Logger glogger = LogManager.GetCurrentClassLogger();

    public static Func<Stream, PostModel, int, CustomMpMessageHandler> GenerateMessageHandler = (stream, postModel, maxRecordCount) 
        => new CustomMpMessageHandler(stream, postModel, maxRecordCount, false);

    public CustomMpMessageHandler(Stream inputStream, PostModel postModel, int maxRecordCount = 0, bool onlyAllowEcryptMessage = false, DeveloperInfo developerInfo = null)
        : base(inputStream, postModel, maxRecordCount, onlyAllowEcryptMessage, developerInfo)
    {
    }

    public override IResponseMessageBase OnEventRequest(IRequestMessageEventBase requestMessage)
    {
        return base.OnEventRequest(requestMessage);
    }

    public override IResponseMessageBase DefaultResponseMessage(IRequestMessageBase requestMessage)
    {
        var responseMessage = base.CreateResponseMessage<ResponseMessageNews>();
        responseMessage.Articles.Add(new Article()
        {
            Title = $"消息类型：{requestMessage.MsgType},欢迎{requestMessage.FromUserName}关注{TF.GetConfig().WebTitle}",
            Description = $"{TF.GetConfig().WebDescription}",
            PicUrl = TF.GetConfig().WebLogo,
            Url = TF.GetConfig().WebUrl
        });
        return responseMessage;
    }

    public override IResponseMessageBase OnTextRequest(RequestMessageText requestMessage)
    {
        var responseMessage = base.CreateResponseMessage<ResponseMessageText>();
        responseMessage.Content = $"您发送了文字：{requestMessage.Content}";
        glogger.Info($"您发送了文字：{requestMessage.Content}");
        return responseMessage;
    }

    public override IResponseMessageBase OnVoiceRequest(RequestMessageVoice requestMessage)
    {
        var responseMessage = base.CreateResponseMessage<ResponseMessageText>();
        responseMessage.Content = $"您发送了语音：{requestMessage.MediaId}";
        return responseMessage;
    }


}

}

都配置完，使用公众号发送消息，公众号只会收到默认DefaultResponseMessage的消息 响应。
重载的 OnTextRequest，OnVoiceRequest都没有任何反应，怎么解决呢？