Up until now, you couldn’t put an await in a catch or finally block. That changes in C# 6.

I’ve got this Logger class, whose implementation is pretty trivial. This is how I’m using it in a simple WPF application’s button event handler:

        private async void Button_Click(object sender, RoutedEventArgs e)
        {
            using (var logger = new Logger())
            {
                try
                {
                    await logger.LogAsync("Executing operation...");
                }
                catch (Exception ex)
                {
                    await logger.LogAsync(ex.ToString());
                }
                finally
                {
                    await logger.FlushAsync();
                }
            }
        }

As you can see, in C# 6 you can now await asynchronous operations from within your catch and finally blocks, which is very useful in cases such as the above.