Prompts
To display a prompt you can use the IPrompts interface directly or the aggregate INotifications as follows:
var value = await notifications.Prompts.DisplayAsync("Question", "What's your name?");

The Display method also provides additional optional parameters:
accept- the text for the accept button.cancel- the text for the cancel button.placeholder- the placeholder text to display in the user prompt.maxlength- the max length of the user's response.keyboard- the keyboard type to use. This is provided via an enum value.initialValue- a predefined default value for the user to provide.