I have Two Threads and a float-type value has been shared between these Threads.
A float-type value is written on Thread1 and reads by Thread2.
Thread1 and Threda2 Start at the same time.

     private const int BUFFER_SIZE = 65536 * 8;
     private float _readWriteValue = 0;
     private bool _stop = false;
    
     private void Thread1()
     {
         Random ran = new Random();
         while (!_stop)
         {
             _readWriteValue = ran. Next(1, 100);
         }
     }
     private void Thread2()
     {
         while (!_stop)
         {
             float[] BufferData  = new float[BUFFER_SIZE];
             for (int i = 0; i < BUFFER_SIZE; i++)
             {
                 BufferData[i] = _readWriteValue;
             }
             ProcessMethod(BufferData);
         }
     }
    
     private void ProcessMethod(float[] data)
     {
         // Do Something
     }

So, When I check BufferData, it fills by only one number. for example, the BufferData fills only with 22. It seems when _readWriteValue goes to for loop in Thread2, has been locked and Thread1 can not write a new value in it.
I’m trying to find out what is the solution. I’m trying by lock, Monitor, and ConcurrentQueue, but every time I get the same results. BufferData is filled by only one number.

Do I have a wrong understanding of the Multi-Threading?
What Should I do?