If you just want a common runtime, what's wrong with java apps
Oracle v. Google. By CLR I assume you mean the CLI, but only a fool would trust a "standard" controlled by MS and driven by a proprietary implementation, not to mention that the latest version doesn't even have a patent promise from them.
And all they had to do was pay Keker & Van Nest for two years, without knowing whether they'd win or not - and Google didn't even make a VM that can run Java apps!
Not to mention that Oracle has appealed, so we still don't know if Google is clear or not.
If you want to risk getting yourself or your company involved in that quagmire, by all means do so.
https://developer.mozilla.org/en-US/Apps/Publishing/Packaged...