HttpClient - Header - ContentLocation

Hi,

I used the nuget package "https://www.nuget.org/packages/Microsoft.Net.Http/" Microsoft.Net.HttpClient to manipulate a REST API from a portable class library that support :

.Net Framework 4.5

W8

WP8.1

Xamarin.Android

Xamarin.IOS

Xamarin.IOS (classic)

This API need for a specific command a parameter "Content-Location" in the header.

I use the header of the HttpRequestMessage.

I can insert the key "ContentLocation" but not the key "Content-Location". In the RFC 2616 the header key is well "Content-Location".

Is there a way to force a specific key in the header ?
Is there a way to notify this bug to the specific team if it is one ?

thanks