* Add HeaderNames.XRequestedWith = "X-Requested-With"
X-Requested-With is the standard for differentiating AJAX requests and is commonly used. Having this in HeaderNames would prevent typos related to typing this header name. I couldn't find any rationale about excluding this but there might be legitimate reasons like discouraging the use of HTTP headers or differentiating AJAX requests, etc. Please reject this if that's the case.
* Replace "X-Requested-With" references with HeaderNames.XRequestedWith
The only remaining instance is WebSocketsTransport.cs in
SignalR\clients\csharp\Http.Connections.Client which doesn't have
Microsoft.Net in its references. I didn't want to impose a new
dependency as its risky.
* Fix the order of using statements
* Add XRequestedWith to the ref assembly
Hao Kung
Sedat Kapanoglu
Chris Ross
Nate McMaster