RestSharp vs HttpClient

Hi,

I need to consume the web api designed in our app (iOS/Android) and I inherited a wrapper of RestSharp.
Everything was working fine until we realized dates sent form the server in UTC format (ie: "2013-10-18T22:13:55Z") it actually converts the UTC to Local Time when deserializing the response.

I'm considering moving to HttpClient, which is supported in Xamarin, but I wanted to ask for some feedback before I do this.

Thanks,
R.