2010 April 15, …
Update to above correct answer from Eugene, after .net 4 and vs2010 was released.
I downloaded vs2010 and .net 4 runtime.
The production version seems to be v4.30319 ie (C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319)
After reviewing http://paigecsharp.blogspot.com/2009/08/nant-net-framework-40-configuration.html, …
I pasted in the text and changed all text from v4.0.20506 to v4.30319 an
added text to NAnt.exe.config.
I then updated my nant script to
<property name="nant.settings.currentframework" value="net-4.0" />,
this so my project nant script uses the .net 4 compiler
And this got me a nant build with .net 4 binary ….
Update 2010-06-14: The above was answered with nant-0.85, I upgraded to nant-0.90 and had to add vendor="Microsoft" to framework attribute that is added to nants config. Also, it looks like nant0.9 finds the .net libraries differently, as I had to add something like this to my nant build.xml …
<property name="framework-get-assembly-directory" value="${framework::get-assembly-directory('net-4.0')}" />
<property name="dotNetReferenceAssemblyPath" value="${framework-get-assembly-directory}\" />
and
<include name="${dotNetReferenceAssemblyPath}System.ComponentModel.DataAnnotations.dll" />