useplugins results in failure to locate System.Runtime.Loader v4.0.0

[tannergooding]

As per the title, in v1.0.38 (but not in v1.0.37) specifying /useplugins results in an exception being thrown as System.Runtime.Loader v4.0.0 cannot be loaded.

Is it worth fixing this? Would it be worth changing how plugins work slightly, such as by using the newer System.Composition based support and loading assemblies from an explicit plugins folder so the assemblies loaded/searched can be minified?

• I'm willing to submit a PR to do the latter here, I haven't root caused the issue with System.ComponentModel.Composition yet...

[KirillOsenkov]

I honestly never got plugins working (this was an external contribution), so doubt if there's any value.

I'm tempted to just delete the plugin/MEF infrastructure, but this might break someone's workflow.

If the original contributor comes back or if someone else wants to investigate and fix that's fine, but my plan here is to do nothing.