DotNetCorePlugins: Plugin depending on System.Drawing.Common cannot be used properly

Describe the bug When using the PluginLoader to load a library that references System.Drawing.Common, anytime any code executes from your plugin that uses a component from that library (PrintDocument in our case), the code blows up with an error claiming System.Drawing is not supported on this platform.. Obviously that is cross platform now (and I’m running this on Windows to boot).

To Reproduce Steps to reproduce the behavior:

1. Add a reference to System.Drawing.Common to your plugin project.
2. Write some basic functionality that uses that library (instantiating a PrintDocument is sufficient).
3. Use McMaster.NETCore.Plugins 0.2.0 in you main project
4. Load primary DLL of your plugin using PluginLoader
5. Use reflection (or whatever is easiest) to call the offending System.Drawing code
6. See the exception generated

Expected behavior I would expect this code to work properly as if it weren’t being loaded by a plugin

Additional context As a temporary workaround, if I use the PluginLoaderOptions.PreferSharedTypes flag and reference System.Drawing.Common directly in my host project, things work properly if that helps at all.