Hah I was just looking at this recently. I was looking for a C# version. I couldn't find anything nice though. There's this https://github.com/elw00d/consoleframework but it looks like it hasn't been updated in a long time.
Console? Tick.
TurboVision theme? Tick. (lol)
https://github.com/jinek/Consolonia
> TUI (Text User Interface) (GUI Framework) implementation for Avalonia UI
> Supports XAML, data bindings, animation, styling and the rest from Avalonia.