07.using-adaptive-cards.diff

diff --git a/samples/csharp_dotnetcore/07.using-adaptive-cards/AdaptiveCardsBot.cs b/samples/csharp_dotnetcore/07.using-adaptive-cards/AdaptiveCardsBot.cs
index c64f6527..2f01ab3b 100644
--- a/samples/csharp_dotnetcore/07.using-adaptive-cards/AdaptiveCardsBot.cs
+++ b/samples/csharp_dotnetcore/07.using-adaptive-cards/AdaptiveCardsBot.cs
@@ -11,6 +11,8 @@
 using Microsoft.Bot.Builder;
 using Microsoft.Bot.Schema;
 using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+
 using Remotion.Linq.Parsing.Structure.IntermediateModel;
 
 namespace Microsoft.BotBuilderSamples
@@ -64,14 +66,25 @@ public async Task OnTurnAsync(ITurnContext turnContext, CancellationToken cancel
                 Random r = new Random();
                 var cardAttachment = CreateAdaptiveCardAttachment(this._cards[r.Next(this._cards.Length)]);
                 var reply = turnContext.Activity.CreateReply();
+                string speak = (string)((JObject)cardAttachment.Content).SelectToken("speak");
+                if ( string.IsNullOrEmpty(speak) )
+                {
+                    speak = "Sorry, this card does not contain speech.";
+                }
+                reply.Text = "Please enter any text to see another card.";
+                reply.Speak = speak + " Click the microphone and say anything to see another card.";
+                reply.InputHint = InputHints.AcceptingInput;
                 reply.Attachments = new List<Attachment>() { cardAttachment };
+
                 await turnContext.SendActivityAsync(reply, cancellationToken);
-                await turnContext.SendActivityAsync("Please enter any text to see another card.", cancellationToken: cancellationToken);
+                // the statement below will clear Cortana's canvas, so we add the help to the card
+                // await turnContext.SendActivityAsync("Please enter any text to see another card.", cancellationToken: cancellationToken);
             }
             else if (turnContext.Activity.Type == ActivityTypes.ConversationUpdate)
             {
                 if (turnContext.Activity.MembersAdded != null)
                 {
+                    // note that Cortana receives a launch intent; see the simple-prompt patch re how to support launch help
                     await SendWelcomeMessageAsync(turnContext, cancellationToken);
                 }
             }
@@ -98,6 +111,7 @@ private static async Task SendWelcomeMessageAsync(ITurnContext turnContext, Canc
             {
                 if (member.Id != turnContext.Activity.Recipient.Id)
                 {
+                    // note this will not speak the welcome in the Cortana channel; it will welcome users in a chat channel
                     await turnContext.SendActivityAsync(
                         $"Welcome to AdaptiveCardsBot {member.Name}. {WelcomeText}",
                         cancellationToken: cancellationToken);