aspnet/Razor — pull request #228 by NTaylorMullen (2014-11-18 23:04:25+00:00)
Title: Add hook to add TagHelperDirectiveDescriptors.

- Also added a test to validate that you can hook into the TagHelperDescriptorResolutionContext.

Ultimately this will be used to tie into the ViewStart finding of `@addtaghelper` and `@removetaghelper`

#214

/cc @pranavkm