MonoDevelop 2.6 Beta 1 (2.5.90) Targets .NET 1.0 Framework in Csproj files?

Can anyone tell me why when I create Mon开发者_StackOverflow社区otouch projects in the latest drop of MonoDevelop it is targeting the 1.0 framework instead of 3.5, as my projects in earlier versions do? This causes it to not be loadable in VS2010, which I tend to use for coding, while building/testing in MonoDevelop. Here is the version info:

Release ID: 20509002
Git revision: 35a0397615c02f7830d46dfcd31a6c0cb86e9f85
Build date: 2011-04-06 03:37:58+0000

And here is the difference in the csproj files between versions:

Old:

<TargetFrameworkVersion>v3.5</TargetFrameworkVersion>

New:

<TargetFrameworkVersion>v1.0</TargetFrameworkVersion>

The v3.5 was a bug; MonoTouch projects never targeted the .NET v3.5 framework. They target the MonoTouch framework, which is arbitrarily versioned as v1.0.

Improvements in MD 2.6 have allowed us to deal with custom .NET frameworks in a similar way to VS 2010. This means that instead of storing the "closest" .NET framework then internally switching it to the correct framework after the project is loaded, we can directly handle particular project types using a particular custom framework.

If you want to load MT project in VS, you already have to make changes to the project - temporarily remove the project flavor GUID (though a trivial VS addin could make that unnecessary). This framework version fix means that you also have to change the target framework to one that VS has. For MonoTouch 4, rather than using .NET 3.5, I would recommend using either Silverlight 4 or .NET 4.

The best solution would be to set VS to actually use the MonoTouch framework, so you'd get accurate code completion and compilation. In VS 2010 that's now possible. Simply set the TargetFrameworkIdentifier of the project to "MonoTouch", then install the custom framework by copying all the MonoTouch framework assemblies to C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\MonoTouch\v1.0 and adding a FrameworkList.xml manifest in the RedistList subdirectory.

I've created a small open source project that enables you to build MonoTouch projects inside Visual Studio 2010. The readme for the project also explains how to get round the "v1.0" problem for the target framework version.

The project is available at https://github.com/follesoe/VSMonoTouch.

Since that's a Monotouch project, nobody expects it to work for Visual Studio or Windows.