public async static Task<DirectMessage> GetDirectMessageSingle(this IUserSession session, long Id)
{
var parameters = new TwitterParametersCollection();
parameters.Create(id: Id, full_text:true);
return await session.GetAsync(TwitterApi.Resolve("/1.1/direct_messages/show.json"), parameters)
.ContinueWith(c => c.MapToSingle<DirectMessage>());
}