Environment

• Pythonnet version: djoyce82's core_clr candidate
• Python version: 2.7
• Operating System: Red Hat Linux

Details

Use Nuget to obtain the System.Configuration.ConfigurationManager package:

<PackageReference Include="System.Configuration.ConfigurationManager" Version="4.4.1" />

then:

    from System.Configuration import ConfigurationManager

The code then throws a LockRecursionException in AssemblyList.GetEnumerator(), caused by EnterReadLock() when another lock is already held.

This is probably caused by the fact that System.Configuration and System.Configuration.ConfigurationManager are both assemblies that need to be loaded, and there is a race condition between the AssemblyLoadHandler, the ResolveHandler, LookupType and FindLoadedAssembly.