Support alternate screen buffer?

Is your feature request related to a problem? Please describe. Be neat if main and alt buffers were supported. I want my app to do everything in one buffer then switch back to the main one on exiting and restore the original screen buffer

Describe the solution you’d like Maybe something like

AnsiConsole.Console.SetBuffer(Buffer.Main)
AnsiConsole.Console.SetBuffer(Buffer.Alternate)

Describe alternatives you’ve considered

AnsiConsole.Console.Write(Segment.Control("\u001b[?1049h")); // alternate
// do stuff
AnsiConsole.Console.Write(Segment.Control("\u001b[?1049l")); // main

Additional context This might be cruising for a bruising. Just playing with it by sending in the escape codes by hand screws with things it seems. E.g. tables for some reason get rendered on both on my test app.

[patriksvensson]

@phil-scott-78 I’ve been thinking a bit. We could add new capabilities to the Profile so the user can check if it’s supported or not, and simply throw an exception if we’re on a terminal we know can’t handle it.

I’m reopening this issue.

[phil-scott-78]

@Entomy, have you seen PR #308 yet? If not that’s even better. I think the implementation you came up with is inline with what @patriksvensson came up with too, but we stalled out right before the finish line looking for confirmation that we were in a good place with the implementation.

If you get a chance could you pull it down and provide any feedback on how it compared with your solution e.g. why ref struct, etc.

Thanks!