Command-line-api: docs: add example of AddArgument

[tmds]

The documentation doesn't include an example of AddArgument.

I'm actually looking how I can collect a bunch of arguments that are after --.
For example: ./my-command --option1 value1 -- any additional arguments.
How can I get a string[] that contains: "any", "additional", "arguments"?

cc @Keboo @jonsequitur

[Keboo]

@tmat I believe what you are looking for is the unparsed tokens on the ParseResult. Something like this:
C# [Fact] public void Can_retrieve_unparsed_tokens() { var rootCommand = new RootCommand("my-command") { new Option<string>("--option1"), }; rootCommand.TreatUnmatchedTokensAsErrors = false; var result = rootCommand.Parse("my-command --option1 value1 -- any additional arguments"); result.UnparsedTokens.Should().BeEquivalentTo("any", "additional", "arguments"); }

[jonsequitur]

One additional point: TreatUnmatchedTokensAsErrors isn't necessary here. The behavior of -- is always enabled.