Error when providing an unknown option

[roberthoglund]

First I would like to apologise if what I'm asking for is in the documentation but if so, I couldn't conjure up the correct search phrase.

I would like to abort a command if it receives an option it doesn't recognise. My use case is that I have an option named --dry-run for many commands, which if supplied the command doesn't do any updates. It's a safety thing so if I were to misspell it, e.g. --dyr-run, the command would run and do the update while I'm assuming it won't.

I'm hoping either of these suggestions are possible.

1. There is a setting to set this.
2. There is currently not a setting for this, but it can be added if someone did the work (Which I would volunteer to do)
3. There is no setting, and it's not a suitable feature. But here is how you can do it your self.

[nils-a]

You forgot one point in your enumeration of cases:
There is no such setting, but the required information is already there.

When your Command Executes, it gets a reference to a CommandContext:
This context has a property Remaining of type IRemainingArguments which will contain all arguments that were not used to populate the command/branches and corresponding settings.

So, for your case if context.Remaining.Parsed.Any() || context.Remaining.Raw.Any() is what you are looking for, I guess.

[roberthoglund]

Perfect, that's just what I need.