带有异步Lambda的并行foreach

如果只需要简单的并行性，则可以执行以下操作：

var bag = new ConcurrentBag<object>();var tasks = myCollection.Select(async item =>{  // some pre stuff  var response = await GetData(item);  bag.Add(response);  // some post stuff});await Task.WhenAll(tasks);var count = bag.Count;

如果您需要更复杂的内容，请查看Stephen
Toub的

ForEachAsync