问如何使用响应时间非常短的主API调用1000多个web API

EN

    [HttpGet]
    public async Task<string>  doTaskasync()
    {
        TripDetails obj = new TripDetails();
        GPSCoordinates objGPS = new GPSCoordinates();

        try
        {
    /* uriArray Contains more than 1000 APIs which needs to be exectued. */

           string[] uriArray = await dolongrunningtaskasync(); 

                IEnumerable<Task<GPSCoordinates>> allTasks = uriArray .Select(u => GetLocationsAsync(u));
                IEnumerable<GPSCoordinates> allResults = await Task.WhenAll(allTasks);
        }
        catch (Exception ex)
        {
            return ex.Message ;
        }
    return "success";
    }