我有以下代碼，但來自 Microsoft bot 創(chuàng)建教程https://docs.microsoft.com/en-us/azure/bot-service/dotnet/bot-builder-dotnet-quickstart當(dāng)我復(fù)制并粘貼它時，我的 using 語句似乎沒有在示例中被使用？我已經(jīng)嘗試添加它建議的 using 語句，但我認為這不是必需的。我有錯誤[BotAuthentication]和Activity“找不到類型或命名空間名稱‘活動’”等我也安裝了金塊包。using System.Net;using System.Net.Http;using System.Threading.Tasks;using System.Web.Http;using Microsoft.Bot.Builder.Dialogs;using Microsoft.Bot.Connector;using System;using System.Linq;using System.Configuration;using Microsoft.Bot.Builder.CognitiveServices.QnAMaker;using System.Web.Services.Description;using Microsoft.Bot.Builder.PersonalityChat;using Microsoft.Bot.Builder.PersonalityChat.Core;namespace BenTestBot{    [BotAuthentication]public class MessagesController : ApiController{    public async Task<HttpResponseMessage> Post([FromBody]Activity activity)    {        if (activity.GetActivityType() == ActivityTypes.Message)        {            //await Conversation.SendAsync(activity, () => new Qna_Rich_Cards.Dialogs.QnaDialog().DefaultIfException());            await Conversation.SendAsync(activity, () => new Dialogs.BasicPersonalityChatBotDialog().DefaultIfException());        }        else        {            await HandleSystemMessageAsync(activity);        }        var response = Request.CreateResponse(HttpStatusCode.OK);        return response;    }