在终止线程WPF c#后，从线程中写入文本框

我使用消费者生产者模型，并尝试在终止线程后写入文本框，但它显示了我几个错误，我理解它不能从线程中完成…这是我现在的代码:

void LaunchConsumer()
    {
        while (myReceivedMessage.Count!=8)
        {
            try
            {
                var sampleFromCollection = samples32Collection.Take();   
                TempBuffer.RemoveAt(0);//Remove first object at TempBuffer
                TempBuffer.Add(sampleFromCollection);
                double TempFreq = (SampleRate *ZeroCrossRate(TempBuffer))/(2*TempBuffer.Count);
                //Zero = 387:392
                //One = 393:395
                int counter = myReceivedMessage.Count;
                if(12960.0<TempFreq && TempFreq<13040.0)
                {
                    myReceivedMessage.Add("0");
                    //MyTextBox.AppendText("0");
                    TempBuffer.Clear();
                    TempBuffer = new List<float>(Enumerable.Repeat(0f, (int)(SampleRate * BitTime)));
                }
                else if(13041.0<TempFreq && TempFreq<13131.0)
                {
                    myReceivedMessage.Add("1");
                    //MyTextBox.AppendText("1");
                    TempBuffer.Clear();                    
                    TempBuffer = new List<float>(Enumerable.Repeat(0f, (int)(SampleRate*BitTime)));
                }
                /*else
                {
                    myReceivedMessage.Clear();
                }*/

            }
            catch (InvalidOperationException) { }
        }
        myWaveIn.StopRecording();
        MyTextBox.Text = myReceivedMessage.ToString();//Here I get an error..
        Terminate();
    }

    void Terminate()    //Call this to terminate the consumer
    {
        consumer.Abort();
    }

if (!MyTextBox.Dispatcher.CheckAccess())
{
    MyTextBox.Dispatcher.Invoke(() => { MyTextBox.Text = myReceivedMessage.ToString(); });
}
else
{
    MyTextBox.Text = myReceivedMessage.ToString();
}