ThreadPool.QueueUserWorkItem

public static void Main()
{
		// call QueueUserWorkItem to queue your work item
		ThreadPool.QueueUserWorkItem(Speak);
		// 入参
		//ThreadPool.QueueUserWorkItem(Speak, "Hello World!");

		Console.WriteLine("Press Enter to terminate!");
		Console.ReadLine();
}

//your custom method you want to run in another thread
public static void Speak(object stateInfo)
{
		// No state object was passed to QueueUserWorkItem, so stateInfo is null.
		Console.WriteLine("Hello World!");
}