问使用async/ await或其他

EN

public Task InitializeAsync(...)
{
    await Send1stMessageAsync();
    await Send2ndMessageAsync();
}

public Task InitializeAsync(...)
{
    var task1stMessage = Send1stMessageAsync();
    // this thread will do everything inside Send1stMessageAsync until it sees an await.
    // it then returns control to this function until there is an await here:
    DoSomeThingElse();
    // after a while you don't have anything else to do, 
    // so you wait until your first messages has been sent
    // and the reply received:
    await task1stMessage;
    // control is given back to your caller who might have something
    // useful to do  until he awaits and control is given to his caller etc.
    // when the await inside Send1stMessageAync is completed, the next statements inside
    // Send1stMessageAsync are executed until the next await, or until the function completes.

    var task2ndMessage = Send2ndMessageAsync();
    DoSomethingUseful();
    await task2ndMessage;
}

async Task WaitForCompletion()
{
    await Task.Run(()=>
    {
        while(!theBoolVar)
            Thread.Sleep(1000);
    });
}

await WaitForCompletion();