[Mono-dev] InvalidProgramException running .NET 4.0 app

Marek Safar marek.safar at gmail.com
Mon Nov 14 10:44:07 UTC 2016


> One of the libraries uses System.Xml namespace from mono,  I can
> compile, but at runtime I get this system:InvalidProgramException: Invalid
> IL code in System.Uri:op_Equality(System.Uri,System.Uri): method body is
> empty [...]

This is most likely due to using reference assembly. We've fixed the issue
recently and the fix should
be included in Mono 4.8 release. As a workaround you can either target .NET
4.5 instead or disable
local copy of the System.dll in Mono Develop project reference settings.

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