TaskHelper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace CodeZone.Helpers.Async
{
    public static class TaskHelper
    {
        public static Task<T> StartSTATask<T>(Func<T> func)
        {
            var taskCompletionSource = new TaskCompletionSource<T>();
            var thread = new Thread(() =>
            {
                try
                {
                    taskCompletionSource.SetResult(func());
                }
                catch (Exception e)
                {
                    taskCompletionSource.SetException(e);
                }
            });
            thread.SetApartmentState(ApartmentState.STA);
            thread.Start();

            return taskCompletionSource.Task;
        }

        public static Task StartSTATask(Action act)
        {
            return StartSTATask(() =>
            {
                act();
                return true;
            });
        }
    }
}