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public async void PostMessage(string id, string msg)
        {
            MicrosoftAppCredentials Credentials = new MicrosoftAppCredentials("ID", "Password");
            ConnectorClient connector = new ConnectorClient(new Uri("https://dev.botframework.com/"), Credentials);
            IMessageActivity newMessage = Activity.CreateMessageActivity();
            newMessage.Type = ActivityTypes.Message;

            newMessage.Conversation = new ConversationAccount(null, id, null);
            newMessage.Text = msg;

            await connector.Conversations.SendToConversationAsync((Activity)newMessage);
        }