Parallel.ForEach与Task.Run和Task.WhenAll

Question

使用Parallel.ForEach或Task.Run（）异步启动一组任务之间有什么区别？

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);