what's the best way to call a normal method in async way?

Just have a normal method like

void DosomethingLong()

What's the best way to ca开发者_如何学编程ll it in an async way?

The standard way is to create a delegate of the method:

Action myMethod = DosomethingLong;

then execute it asynchronously using the APM (example):

IAsyncResult result = myMethod.BeginInvoke(..., null);

// ...

myMethod.EndInvoke(result);

There are other methods you can use; using a Thread, using BackgroundWorker, etc, depending on your exact requirements.

If using .NET 4 you could do

var yourLongRunningTask = Task.Factory.StartNew(DosomethingLong);
// some time later
Task.WaitAll(yourLongRunningTask);