Modify the destination for the response - botframework

Question

I use Microsoft Bot Framework. From: https://dev.botframework.com/
AND
Microsoft Bot Emulator (V4 Preview) version 4.0.15-alpha. From: https://github.com/microsoft/botframework-emulator
I created a new C# project with "Bot Application" template. I run this project. I launched two entities of the Emulator.
Now I receive the message from the first Emulator entity but I want to send the response to the second Emulator entity. How can I do this?
This is the function where I try to modify the destination (the code that is commented) but does not work.
/// <summary>
/// POST: api/Messages
/// Receive a message from a user and reply to it
/// </summary>
public async Task<HttpResponseMessage> Post([FromBody]Activity activity)
{
//activity.Recipient.Id = "default-user";
//activity.ServiceUrl = "http://localhost:52234";
//activity.Conversation.Id = "e7bbb310-a93c-11e8-8dcc-7d6fd69e3901|livechat";
//activity.ReplyToId = "6cc291f0-a93d-11e8-9634-9f01a6c082d4";
if (activity.Type == ActivityTypes.Message)
{
await Conversation.SendAsync(activity, () => new Dialogs.RootDialog());
}
else
{
HandleSystemMessage(activity);
}
var response = Request.CreateResponse(HttpStatusCode.OK);
return response;
}

Answer 1

I launched two entities of the Emulator. Now I receive the message from the first Emulator entity but I want to send the response to the second Emulator entity. How can I do this?
Before you write code to send message to another emulator, you need to get the value of ServiceUrl and conversationId etc. And then you could refer to the following code to send message to the specified conversation.
In dialog:
await context.PostAsync($"{this.count++}: You said {activity.Text}");
var userAccount = new ChannelAccount(name: "User", id: "default-user");
var botAccount = new ChannelAccount(name: "Bot", id: "default-bot");
var connector = new ConnectorClient(new Uri("{your_ServiceUrl_here}"));
IMessageActivity message = Activity.CreateMessageActivity();
message.From = botAccount;
message.Recipient = userAccount;
//specify conversationId
message.Conversation = new ConversationAccount(id: "{your_conversationId_here}");
message.Text = $"You said {activity.Text} from emulator1";
message.Locale = "en-Us";
await connector.Conversations.SendToConversationAsync((Activity)message);
context.Wait(MessageReceivedAsync);
Test result: