Is your feature request related to a problem? Please describe.
SelectionPrompt does not contain a "Select" -method. It is however available on MultiSelectionPrompt.

Describe the solution you'd like
Option 1:
Add the same "Select" and "IsSelected" -methods (as available in MultiSelectionPromptExtensions) to the SelectionPromptExtensions -class.

Option 2:
Add a "DefaultValue" (as available in TextPrompt) to the SelectionPromptExtensions -class.

Describe alternatives you've considered
I'm currently planning to work around this by setting the selected item as the first one in the list of choices. But that might be confusing for users.

Please upvote 👍 this issue if you are interested in it.