问题
When I try to write a new using clause, I notice that Intellisense has, in its list, a namespace called Standard. However, this seems to have no members on closer inspection. What is this namespace?
回答1:
There is a namespace in the PresentationFramework assembly called "Standard". All of its types are internal though, so you can't see any of the types. However, you can still use the namespace.
The namespace seems to have appeared in the 4.5 reference assembly, it doesn't appear in the 4.0 one.
来源：https://stackoverflow.com/questions/15027084/what-is-the-namespace-standard