[Mono-dev] Mono and vNext, What is microsoft supporting

Rafael Teixeira monoman at gmail.com
Wed Nov 5 11:57:11 UTC 2014

As I follow the github discussions in some of the asp.net vnext
subprojects, I see them testing on Mono (in MacOS X) as part of the
development process, but yet some things are lagging a bit... :)

On Wed Nov 05 2014 at 9:43:28 AM Martin Thwaites <monoforum at my2cents.co.uk>

> So, after thinking about this further.  The question I have is not really
> about CoreCLR.
> What I want to know is, the libraries that Microsoft are making available
> via their nuget (myget at the moment), are these going to be tested again
> .net, mono and CoreCLR? I.e will the libraries be cross platform?
> Thanks
> Martin
>  I just asked about CoreCLR on Linux during today's ASP.NET vNext
> community standup and the answer was:
> "CoreCLR runs on Windows. On Linux you use Mono." (
> https://www.youtube.com/watch?v=2oafQVI4Lx4#t=706)
> That should clarify it pretty much :)
> -- Alex
> > From: alex.koeplinger at outlook.com
> > To: monoforum at my2cents.co.uk; mono-devel-list at lists.ximian.com
> > Date: Sat, 25 Oct 2014 21:52:59 +0200
> > Subject: Re: [Mono-dev] Mono and vNext, What is microsoft supporting
> >
> > Note: the following is based on discussions with David Fowler (one of
> the MS devs) et.al. in JabbR and other places. I'm not part of MS/vNext
> team or Xamarin, so I may be totally wrong :)
> >
> >
> >
> > >> "CoreCLR is intended to be Windows-only too from what I've heard, as
> it doesn't make much sense for Mono (you can already do side-by-side
> deployment of Mono)."
> > > Where have you seen this, do you have a link you can send? This is a
> major missing piece of the puzzle for me. I've been hoping that with vNext,
> applications would be truely cross platform, but it seems we are still very
> much reliant on Mono's class implementations.
> > > I've read an article[1] that says the CoreCLR ("Cloud Optimized") is
> to be "Cross Platform". If that is the case, and there are no plans to make
> a linux compatible version and just use mono, they could easily say the
> same about the .NET 4.5 class libraries as they are available in mono.
> >
> >
> > You should keep in mind that CoreCLR is just that - another runtime
> implementation (they based this off of the old Silverlight runtime which
> was side-by-side deployable). What they now put on top is the class
> libraries distributed via NuGet, resulting in this self-contained
> experience. As I said, it's just one of the options alongside .NET CLR and
> Mono CLR, like this picture from your article shows:
> http://blogs.msdn.com/cfs-filesystemfile.ashx/__key/communityserver-blogs-components-weblogfiles/00-00-00-84-75-metablogapi/7356.image_5F00_70B63F1D.png
> (the article never says the CoreCLR is cross-platform, just the vNext
> application itself)
> >
> >
> > > So either, when Microsoft refer to "Cross platform", they are only
> referring to applications that rely on no class libraries and only corlib
> (is that a thing can an application be purely reliant on no class
> libraries?). Alternatively, they are relying on Mono to create a CoreCLR (I
> wouldn't be surprised if they've ask for Xamarin's help in doing that).
> >
> >
> > The end result should be that you can run your app on .NET, CoreCLR and
> Mono and the app doesn't care. The problem with the web frameworks like MVC
> etc. up until now was that they were tightly coupled to System.Web, which
> is not open-source and very difficult to reimplement in Mono (and to be
> honest likely also lagged behind because Xamarin's focus is on mobile). The
> new vNext stacks don't rely on System.Web anymore and just use the basic
> class libraries that are well implemented on Mono too (like corlib,
> System.Net etc. as they're important to Xamarin). It should be a much much
> better experience given that Microsoft actively tests the vNext stack on
> Mono. Now if **your** application code relies on something that isn't
> implemented on Mono then that's a problem, sure.
> >
> >
> > > I am aware that you can side-by-side in mono, however, I thought that
> one of the other big benefits of vNext was the reduction in footprint,
> specifically around the memory footprint per request. So you can opt-in/out
> of specific features.
> >
> >
> > Maybe they'll make this whole CoreCLR/small-footprint - experience
> available on other OSs as well, but from what I've heard this is targeted
> at Windows for now.
> >
> >
> > -- Alex
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