public async Task <IActionResult> TestAsync()
{
var task = Task.Run(() => {
ViewBag.Thread2 = _first.GetStringAsync("I'm Second").Result;
});
ViewBag.Thread1 = await _first.GetStringAsync("I'm First");
ViewBag.Thread3 = _first.GetStringAsync("I'm Third").Result;
ViewBag.ThreadCurrent = $@"Thread ID : {Thread.CurrentThread.ManagedThreadId}";
return(View());
}