The Simplest Way to Measure Code Coverage?

Never write tests just for coverage! But a coverage report can still be a useful tool nevertheless.
Coverage script:
github.com/pla...

[@Stefan-bp6ge]

Nice work!

[@pl4gueis]

F# mentioned nice. That code looks like an affair baby of C# and F# though :D
Could be cleaner with more F# idiomatic code for example pattern matching like this:
let main args =
match args with
| [|_; "install"|] -> install()
| [|_; workspace|] -> workspace |> collect |> openBrowser
| _ ->
Console.Error.WriteLine("Specify 'install' to install required tools")
Console.Error.WriteLine("OR a workspace to create a coverage report")
exit 1
main fsi.CommandLineArgs