BackgroundWorker bwst = new BackgroundWorker();
if (!bwst.IsBusy)
{
        bwst.WorkerReportsProgress = true;
        bwst.DoWork += delegate
        {
                MyMethod();

        };

        bwst.RunWorkerCompleted += delegate
        {

                // Do something when finished
        };

        bwst.RunWorkerAsync();
}