New Post: Method overloads with a CancellationToken parameter

Right now some of TAP-based methods in System.Net.Http.Formatting library does not have overloads with a CancellationToken parameter. For instance next classes:

HttpContent
HttpContentExtensions
HttpContentMessageExtensions
HttpContentMultipartExtensions

which methods actually can be executed for a long time period. In addition if we're trying to create custom MediaTypeFormatter we unable to cancel ReadFromStreamAsync and WriteToStreamAsync methods.

I suppose that it will be great if such methods will contain an overloads with a CancellationToken parameter, which should be integrated into Web API message handling pipeline.

What do you think about it? Is it possible to do that in the v5 release?