WPF线程:“无法使用已与其基础RCW分离的COM对象。”

我遇到以下错误:

"COM object that has been separated from its underlying RCW cannot be used."

我确信问题是因为COM对象不是在创建它的线程上被调用-sta。我试图实现IDisposable,但它对我没有作用。

有几个职位处理类似问题,但仍然无法解决我的问题:

Is it safe to call an RCW from a finalizer? Release Excel Object In My Destructor

是否有人可以发布一个示例/解释如何从另一个线程正确访问COM对象?

下面是显示问题的最小代码:

using System;
using System.Threading;

namespace Test.ComInterop
{
    public class Program
    {
        MyCom _myCom;

        [STAThread]
        static void Main( string[] args )
        {
            new Program();
        }

        public Program()
        {
            _myCom = new MyCom();

            // this method call works
            string version = _myCom.ComMethod();

            StartThread();
        }

        private void StartThread()
        {
            Thread t = new Thread( UIRun );
            t.SetApartmentState( ApartmentState.STA );
            t.Start();
        }

        void UIRun()
        {
            TestUI window = new TestUI();
            window.Show();

            // this method call fails
            window.Title = _myCom.ComMethod();

            window.Closed += ( sender2, e2 ) 
                => window.Dispatcher.InvokeShutdown();

            System.Windows.Threading.Dispatcher.Run();
        }
    }

    class MyCom
    {
        private dynamic _com;
        public MyCom()
        {
            _com = Activator.CreateInstance(
                Type.GetTypeFromProgID( "Excel.Application" ) );
        }

        public string ComMethod()
        {
            return (string) _com.Version;
        }
    }    
}