我发现这个例子更接近你的需要： C＃异步，等待 [ ^ ]

Hello All,

I want to use async and await in my application where I am getting PDF files from particular folder, copy into another folder, convert it into image files, perform rotation, split, merge, swapping operation on images and save the changed file in PDF through iTextSharp.

Can anyone help me how should I implement async and await to optimize the performance of the application.

I found that this example is closer to your need: C# Async, Await[^]