If the action returns an HttpResponseMessage, Web API converts the return value directly into an HTTP response message, using the properties of the HttpResponseMessage object to populate the response. This option gives you a lot of control over the response message. For example, the following controller action sets the Cache-Control header.
The Macchiato Defined. The macchiato (mah-key-AH-toe) is a cornerstone of Italian coffee culture, along with the espresso and cappuccino, among other coffee drinks. It's basically an espresso (served in a demitasse cup) with a small amount of foamed milk on top -- the name macchiato means marked.
How to Make a Macchiato Coffee. CafÃ¨ Macchiato is Italian for marked (with froth). A CafÃ¨ Macchiato is a small simple drink of an espresso shot or double shot marked with a touch of delicious frothy milk.