在WindowForm應用程序中主要的線程，是采用一種稱為「Single-Threaded Apartment(STA)」的線程模型。這個STA線程模型，在線程內加入了訊息幫浦等等機制，減少開發人員撰寫窗口程序的工作量。
 

而在開發類別庫的時候，如果要使用類似的STA線程模型，可以使用下列的程序代碼提供的類別來完成。
代碼如下:
namespace CLK.Threading
{
    public class STAThread
    {
        // Enum
        private enum ThreadState
        {
            Started,
            Stopping,
            Stopped,
        }

 
        // Fields
        private readonly object _syncRoot = new object();

        private readonly BlockingQueue<Action> _actionQueue = null;

        private Thread _thread = null;

        private ManualResetEvent _threadEvent = null;

        private ThreadState _threadState = ThreadState.Stopped;     

 
        // Constructor
        public STAThread()
        {
            // ActionQueue
            _actionQueue = new BlockingQueue<Action>();

            // ThreadEvent
            _threadEvent = new ManualResetEvent(true);

            // ThreadState
            _threadState = ThreadState.Stopped;     
        }

 
        // Methods
        public void Start()
        {          
            // Sync
            lock (_syncRoot)
            {
                // ThreadState
                if (_threadState != ThreadState.Stopped) throw new InvalidOperationException();