How to get bold text in the title in CardAction - .net-core

Question

Is it possible to get bold text in the title of a CardAction() in bot framework v4? I'm using it in a HeroCard. I've tried ** Option One ** but it only works in the text of a HeroCard for example, but not in the CardAction() buttons.
Here's my implementation of CardActions in a HeroCard:
var Options = new HeroCard
{
Text = "What do you choose?",
Buttons = new List<CardAction>
{
new CardAction() { Title = "Option One, Type = ActionTypes.ImBack, Value = ""Option One" },
new CardAction() { Title = "Go back", Type = ActionTypes.ImBack, Value = "Go back" },
},
};

Answer 1

You can't. It's up to each channel to determine how to display cards.
Alternatively, you can try using an Adaptive Card with something like the following JSON:
{
"type": "AdaptiveCard",
"body": [
{
"type": "TextBlock",
"text": "What do you choose?"
},
{
"type": "Container",
"items": [
{
"type": "Container",
"items": [
{
"type": "TextBlock",
"text": "Option One",
"weight": "Bolder",
"horizontalAlignment": "Center",
"size": "Large",
"color": "Accent"
}
],
"selectAction": {
"type": "Action.Submit"
},
"id": "optionOne",
"style": "default"
},
{
"type": "Container",
"items": [
{
"type": "TextBlock",
"text": "Go back",
"horizontalAlignment": "Center",
"size": "Large",
"weight": "Bolder",
"color": "Accent"
}
],
"selectAction": {
"type": "Action.Submit",
"data": "goBack"
},
"id": "goBack",
"style": "default"
}
],
"style": "emphasis"
}
],
"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
"version": "1.0"
}
Again, though, it will be up to the channel for how it wants to display "weight": "Bolder"