public async Task <Session> GetSession(int sessionId)
{
var fetchAllSessions = _httpHelper.FetchSessions();
var sessionDetails = _httpHelper.FetchSession(sessionId);
await Task.WhenAll(fetchAllSessions, sessionDetails);
var session = fetchAllSessions.Result.SingleOrDefault(s => s.Id == sessionId);
if (session == null)
{
throw new SessionNotFoundError();
}
session.Description = sessionDetails.Result.Result;
return(session);
}