Task 带参数和返回值的多线程调用

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static void Main(string[] args)         {               // 无参数异步             var tasks = new List<Task>();             for (int i = 0; i < 5000; i++)             {                 tasks.Add(Task.Run(() => { Console.WriteLine(i); }));             }             Task.WaitAll(tasks.ToArray());               // 带参数异步             var taskList = new List<Task<List<int>>>();             for (int i = 0; i < 5000; i++)             {                 taskList.Add(Task.Factory.StartNew(state => {                     var value= state as int?;                     return new List<int> { value ?? 0 };                 },i));             }             Task.WaitAll(taskList.ToArray());               List<int> list = new List<int>();             foreach (var item in taskList)             {                 list.AddRange(item.GetAwaiter().GetResult());             }             Console.ReadKey();         }

　　参考链接：https://blog.51cto.com/u_15162069/2755137