WaitAll for multiple handles on a STA thread is not supported

Question

1. Why do I get this error message? \"WaitAll for multiple handles on a STA thread is not supported.\"
2. Should I use [MTAThreadAttribute] attribut? Update

Answer 1

What about using the Tasks to do your threading for you.

http://msdn.microsoft.com/en-us/library/system.threading.tasks.task.aspx

var task1 = Task.Factory.StartNew(() => DoSomeWork());
var task2 = Task.Factory.StartNew(() => DoSomeWork());
var task3 = Task.Factory.StartNew(() => DoSomeWork());
Task.WaitAll(task1, task2, task3);