如果你正在使用async/await模式，你可以像这样并行运行几个任务:

public async Task DoSeveralThings()
{
    // Start all the tasks
    Task first = DoFirstThingAsync();
    Task second = DoSecondThingAsync();

    // Then wait for them to complete
    var firstResult = await first;
    var secondResult = await second;
}

我所见过的最佳选择是以下扩展方法:

public static Task ForEachAsync<T>(this IEnumerable<T> sequence, Func<T, Task> action) {
    return Task.WhenAll(sequence.Select(action));
}

这样叫它:

await sequence.ForEachAsync(item => item.SomethingAsync(blah));

或者使用async lambda:

await sequence.ForEachAsync(async item => {
    var more = await GetMoreAsync(item);
    await more.FrobbleAsync();
});

如果你正在使用async/await模式，你可以像这样并行运行几个任务:

public async Task DoSeveralThings()
{
    // Start all the tasks
    Task first = DoFirstThingAsync();
    Task second = DoSecondThingAsync();

    // Then wait for them to complete
    var firstResult = await first;
    var secondResult = await second;
}

还有另一个答案……但我通常会遇到这样的情况，当我需要同时加载数据并将其放入变量中，比如:

var cats = new List<Cat>();
var dog = new Dog();

var loadDataTasks = new Task[]
{
    Task.Run(async () => cats = await LoadCatsAsync()),
    Task.Run(async () => dog = await LoadDogAsync())
};

try
{
    await Task.WhenAll(loadDataTasks);
}
catch (Exception ex)
{
    // handle exception
}

您希望将任务链接起来，还是可以以并行的方式调用它们?

的链接 就像这样

Task.Run(...).ContinueWith(...).ContinueWith(...).ContinueWith(...);
Task.Factory.StartNew(...).ContinueWith(...).ContinueWith(...).ContinueWith(...);

不要忘记检查每个ContinueWith中的前一个Task实例，因为它可能有错误。

对于平行方式 我遇到的最简单的方法是:平行。调用 除此之外还有任务。WaitAll或者你甚至可以使用WaitHandles来做一个倒数到零的动作(等待，有一个新的类:CountdownEvent)，或者…

这是我如何使用数组Func<>:

var tasks = new Func<Task>[]
{
   () => myAsyncWork1(),
   () => myAsyncWork2(),
   () => myAsyncWork3()
};

await Task.WhenAll(tasks.Select(task => task()).ToArray()); //Async    
Task.WaitAll(tasks.Select(task => task()).ToArray()); //Or use WaitAll for Sync