[mono-android] .NET 4.0 + library's

[Steven Taylor]

How possible is it to have core application code (MINUS UI) that runs on
both Touch + Droid?  I'm trying to justify the mono approach.  In principle
it sounds like a good idea.

thanks,
-Steven
On 23 March 2011 19:20, Wally McClure <theevilprogrammer at hotmail.com> wrote:

> I get this question alot.  This is the situation across all of the mobile
> platforms.  there isn't a clean version of .NET on the devices that I am
> familiar with.
>
>    - MonoTouch on iPhone supports .NET 2 with a lot of features from SL
>    and .NET 3.5(LINQ being a big one).  I believe that the next MT version will
>    add many .NET 4 features.  I'm telling people its .NET 3.5 with certain
>    changes appropiate for iOS and that the next version will be .NET 4.
>    - Same is true with Mono for Android, except, that they have many of
>    the .NET 4 features already, such as the PFX features.  I'm telling people
>    its .NET 4 with certain changes appropiate for the device.
>    - WP7 has the same issue.  It is basically SL 3 with more features.
>
>
> It just makes it easier in people's minds.  [image: Smile]
>
> > From: jpryor at novell.com
> > Date: Wed, 23 Mar 2011 09:36:37 -0400
> > To: monodroid at lists.ximian.com
> > Subject: Re: [mono-android] .NET 4.0 + library's
>
> >
> > On Mar 23, 2011, at 8:32 AM, Remco Jansen wrote:
> > > I got a simple question, because cant find the answerers on the
> internet.
> > > Is .NET framework 4.0 supported, are there any often uses library's,
> that are not supported?
> >
> > That's not specific enough. :-)
> >
> > The class libraries that Mono for Android provides is...interesting.
> Succinctly, it's a .NET 4.0-influenced assembly set with an overlapping set
> of Silverlight types and members, lacking the UI bits. (Which likely doesn't
> help at all.)
> >
> > Instead of asking about framework versions, you should instead ask about
> types (and possibly assemblies). :-)
> >
> > For example, the Action<...> and Func<...> family of delegate types are
> supported, up through Action`16 and Func`17, which is what .NET 4.0 and
> Silverlight support.
> >
> > However, the IEnumerable<T> interfaces are not covariant, and thus is
> like Silverlight. The C# compiler we provide on OSX is C#4-ish (it supports
> generic variance declarations, but no `dynamic`, and generic variance isn't
> entirely helpful when most of the class library is lacking support...).
> >
> > Assemblies are .NET 4.0-like, not Silverlight-like, so the System.Net
> namespace is in System.dll (not System.Net.dll). System.Xml.dll contains
> XmlDocument and System.Xml.Linq.dll contains XDocument, like .NET 4.0 (while
> Silverlight drops XmlDocument and moves XDocument into System.Xml.dll).
> >
> > In short, there isn't really a short way to answer your question, except
> "maybe." You can also view the class library documentation, which lists all
> of the namespaces and types provided:
> >
> > http://docs.mono-android.net/
> > http://mono-android.net/Documentation/Assemblies
> >
> > A related question is whether Portable Library Projects are supported. I
> don't know; I haven't tested them. They are not a priority for 1.0, but we
> will support them in a later release.
> >
> > Finally, are there any assemblies that aren't supported? Regarding
> framework assemblies, it again depends upon what your reference is: with
> respect to .NET 4.0, we're missing Windows Worfklow and Windows Presentation
> Foundation (among others, I 'm sure), and the WCF we provide is
> Silverlight-like, not .NET 4.0-like. If your reference is Silverlight, we're
> missing System.WIndows.dll and anything related to it.
> >
> > This variance makes it ~impossible to say whether any existing assemblies
> will work with Mono for Android without recompilation (unless they're
> MonoTouch assemblies; those should work). In all likelihood they won't
> (especially considering assembly naming + assembly versioning), but it
> should be fairly straightforward to recompile the code against the Mono for
> Android assemblies, and we fully expect recompilation to work for most
> things except UI code (which likely won't work at all).
> >
> > - Jon
> >
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