What is the __DynamicallyInvokable attribute for?

Question

Looking through System.Linq.Enumerable in DotPeek I notice that some methods are flavoured with a [__DynamicallyInvokable] attribute.

What

Answer 1

I found that it's used in the Runtime*Info.IsNonW8PFrameworkAPI() suite of internal methods. Having this attribute placed on a member makes IsNonW8PFrameworkAPI() return false for it and thus makes the member available in WinRT applications and shuts up the The API '...' cannot be used on the current platform. exception.

Profiler writers should place this attribute on members emitted by their profiler into framework assemblies, if they want to access them under WinRT.