How do i call an async method from a winforms button click event?

Question

I have an I/O bound method that I want to run asynchronously.

In the help docs it mentions that I should use async and await without Task.Run

to quote

For I/O-bound code, you await an operation which returns a Task or Task inside of an async method.

How do I do this from a winforms button click event?

I have tried

private void button_Click(object sender, EventArgs e)
{ 
      await doLoadJob();
}

private async Task<int> doLoadJob()
{
    await loadJob();   
    return 0;
}

Answer 1

Your button_Click method needs to be async. Place a async between private and void.

private async void button_Click(object sender, EventArgs e)
{ 
     await LongOperation();
}