C＃中的异步加载 - 优化/正确使用？

So I want to make sure all of my database / network operations are not happening on the UI thread of my application. To do this I normally use the BeginInvoke function to make the call and then Invoke to do the actual update. I am not sure if I am doing things correctly compared to the way it should be done. Could anyone please provide comments on the following code:So I want to make sure all of my database / net