Call webservice asynchronously and wait for all threads to be finished

Question

I need to call the web service several times to get data, and then put those data into my database, so I\'ve got the following code:

foreach (string v in options         


        

Answer 1

This downloads all in parallel and stores them into the DB with one write.

var tasks = options.Select(o => Task.Run(() => GetData(o)));
Task.WaitAll(tasks.ToArray());
var nodes = tasks.SelectMany(t => t.Result);
_dbService.SaveToDb(nodes);