<p>Pour ceux qui se posent la même question en C#, voici la solution qui a fonctionné pour moi :</p>
<pre><code class="lang-auto"> var channelData = context.Activity.GetChannelData<TeamsChannelData>();
var message = Activity.CreateMessageActivity();
message.Text = "Hello World";
var conversationParameters = new ConversationParameters
{
IsGroup = true,
ChannelData = new TeamsChannelData
{
Channel = new ChannelInfo(channelData.Channel.Id),
},
Activity = (Activity) message
};
var connectorClient = new Conn