自适应卡未在WebChat中呈现

Question

我想在BDK v4中使用自适应卡来使用下拉列表。仅作为示例，我创建了一个TextBlock来在网络聊天中显示自适应卡。当我在Bot模拟器中测试时，自适应卡显示正常。当我部署代码时，自适应卡不在Webchat中呈现。

任何人都可以帮忙吗？

Attachment skillRecommendationAttachment = new Attachment();
Activity replyToActivity = innerDc.Context.Activity.CreateReply();
skillRecommendationAttachment = GetSkillsCardAttachment();
Attachment GetSkillsCardAttachment()
{
    AdaptiveCard card = new AdaptiveCard("1.0");
    card.Version = "1.0";
    card.Type = "AdaptiveCard";
    card.Body.Add(new AdaptiveTextBlock()
    {
       Text = "NEAR SKILLS",
       Size = AdaptiveTextSize.Large,
       Weight = AdaptiveTextWeight.Bolder,
    });

    Attachment attachment = new Attachment()
    {
       ContentType = AdaptiveCard.ContentType,
       Content = card
     };

     return attachment;
}

replyToActivity.Attachments.Add(skillRecommendationAttachment);
await innerDc.Context.SendActivityAsync(replyToActivity);

显示如下

在这里帮助我如何获得自适应卡？