使用Parallel.ForEach或Task.Run（）異步啟動一組任務之間有什么區別？版本1：List<string> strings = new List<string> { "s1", "s2", "s3" };Parallel.ForEach(strings, s =>{    DoSomething(s);});版本2：List<string> strings = new List<string> { "s1", "s2", "s3" };List<Task> Tasks = new List<Task>();foreach (var s in strings){    Tasks.Add(Task.Run(() => DoSomething(s)));}await Task.WhenAll(Tasks);