[Ironpython-users] IronPython, Daily Digest 9/2/2011

[no_reply at codeplex.com]

Hi ironpython,

Here's your Daily Digest of new issues for project "IronPython".

In today's digest:ISSUES

1. [New issue] Better handling of binding failure due to .Net version

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ISSUES

1. [New issue] Better handling of binding failure due to .Net version
http://ironpython.codeplex.com/workitem/31383
User skottmckay has proposed the issue:

"The error message if binding of an assembly fails (clr.AddReference et al) is woefully unhelpful if the failure is due to attempting to load an assembly from a different clr version. I recently had this problem attempting to load a .net 2 assembly with .net 4 iron python. 

Some options:

1) Is there any reason why IronPython couldn't be shipped with an app.config file with the following to allow loading of .net 2 assemblies in .net 4, or at least information added to the FAQ for the user to create this file themselves (of course they will probably need a better error message to point them in the right direction first).

<?xml version="1.0" encoding="utf-8" ?> 
<configuration> 
  <startup useLegacyV2RuntimeActivationPolicy="true"> 
            <supportedRuntime version="v4.0" />    
  </startup>
</configuration>


2) Could code be added to detect a mismatch and provide the user with a meaningful error message. For example, here are the steps to get the clr version from a dll.

>>> import clr
>>> import System
>>> asm = System.Reflection.Assembly.ReflectionOnlyLoadFrom("my.dll")
>>> print asm.ImageRuntimeVersion
v2.0.50727"
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