// using System.Diagnostics;
// using System.Threading.Tasks;
 
// This Click event is marked with the async modifier.
private async void startButton_Click(object sender, RoutedEventArgs e)
{
    await DoSomethingAsync();
}
 
private async Task DoSomethingAsync()
{
    Task‹int› delayTask = DelayAsync();
    int result = await delayTask;
 
    // The previous two statements may be combined into
    // the following statement.
    //int result = await DelayAsync();
 
    Debug.WriteLine("Result: " + result);
}
 
private async Task‹int› DelayAsync()
{
    await Task.Delay(100);
    return 5;
}
 
// Output:
//  Result: 5