Async modifier in C#

Question

I have the question, what is the difference between these two methods?

    async private void Button_Click_1(object sender, RoutedEventArgs e)
    {
                 


        

Answer 1

Adding async, by itself, does nothing other than allow the method body to use the await keyword. A properly implemented async method won't block the UI thread, but an improperly implemented one most certainly can.

What you probably wanted to do was this:

async private void Button_Click_1(object sender, RoutedEventArgs e)
{
    await Task.Delay(2000);
    MessageBox.Show("All done!");
}