How to close application form from another Thread in C# .NET?

I have two forms, I am running some worker events on a thread in form A, when that work is done I want to close Form A and show Form B.  

If I simply use this.hide() I receive a cross thread exception which makes sense because I am not accessing it from the same thread.  Is this even possible?

private void CreateWorkerThread()
        {
            //Instance a ThreadStart object and intance it with the SnapShot class CollectData method.
            ThreadStart _threadStartA = new ThreadStart(DoWork);
            //Initialize a Thread object and set to null;
            Thread _threadA = null;


            try
            {
                //Instance Thread object with ThreadStart object.
                _threadA = new Thread(_threadStartA);
                //Name the Thread
                _threadA.Name = "Phase1";
                //Spawn the Thread
                _threadA.Start();
            }
            catch (Exception exp)
            {
                MessageBox.Show("Image Apply error: " + exp.Message);
            }
        }
        private void DoWork()
        {
            Test.com.Recovery.Recovery oRecovery = new Test.com.Recovery.Recovery();

            //Hook command line events
            oRecovery.OnCmdStarted += new Test.com.Recovery.RecoverCommandStarted(oRecovery_OnCmdStarted);
            oRecovery.OnCmdExited += new Test.com.Recovery.RecoverCommandExited(oRecovery_OnCmdExited);
            oRecovery.OnCmdOutputLine += new Test.com.Recovery.RecoveryCommandOutputLine(oRecovery_OnCmdOutputLine);

            //Hook image events
            oRecovery.OnStarted += new Test.com.Recovery.RecoverStartedEventHandler(oRecovery_OnStarted);
            oRecovery.OnComplete += new Test.com.Recovery.RecoverCompleteEventHandler(oRecovery_OnComplete);
            oRecovery.OnProgress += new Test.com.Recovery.RecoverProgressEventHandler(oRecovery_OnProgress);
            oRecovery.OnProcess += new Test.com.Recovery.RecoverProcessEventHandler(oRecovery_OnProcess);
            oRecovery.OnError += new Test.com.Recovery.RecoverErrorEventHandler(oRecovery_OnError);

           
            //First we need to get a DiskPart object
            if (oRecovery.ConfigureDisk(PopulateDiskPart(), true))
                if (oRecovery.RecoverImage(PopulateImage(ImageType.Debug)))//Recover 1st image first
                    if (oRecovery.RecoverImage(PopulateImage(ImageType.Debug)))//Recover 2nd image last
                    {
                                         this.Hide() <--- BAD wont work cross thread exception.
                        ***** DONE CLOSE THIS FORM AND OPEN A NEW FORM
                    }
        }