Why thread in background is not waiting for task to complete?
- by Haris Hasan
I am playing with async await feature of C#. Things work as expected when I use it with UI thread. But when I use it in a non-UI thread it doesn't work as expected. Consider the code below
private void Click_Button(object sender, RoutedEventArgs e)
{
var bg = new BackgroundWorker();
bg.DoWork += BgDoWork;
bg.RunWorkerCompleted += BgOnRunWorkerCompleted;
bg.RunWorkerAsync();
}
private void BgOnRunWorkerCompleted(object sender, RunWorkerCompletedEventArgs runWorkerCompletedEventArgs)
{
}
private async void BgDoWork(object sender, DoWorkEventArgs doWorkEventArgs)
{
await Method();
}
private static async Task Method()
{
for (int i = int.MinValue; i < int.MaxValue; i++)
{
var http = new HttpClient();
var tsk = await http.GetAsync("http://www.ebay.com");
}
}
When I execute this code, background thread don't wait for long running task in Method to complete. Instead it instantly executes the BgOnRunWorkerCompleted after calling Method. Why is that so? What am I missing here?
P.S: I am not interested in alternate ways or correct ways of doing this. I want to know what is actually happening behind the scene in this case? Why is it not waiting?
