C#

        static ReaderWriterLockSlim rw = new ReaderWriterLockSlim();
        static Random rand = new Random();

        Thread[] AThreadReader, AThreadWriter;
        Thread ThreadReaderCreator;
        string sDataBase;
        Boolean bWriterMustAlive;
        string[] asReaderDataBase = new string[10];        

private void btnRun_Click(object sender, EventArgs e)
        {
            AThreadWriter = new Thread[Int16.Parse(txtBNMWriters.Text)];
            bWriterMustAlive = true;
            for (int i = 0; i < Int16.Parse(txtBNMWriters.Text); i++)
            {
                AThreadWriter[i] = new Thread(fThreadWriter);
                AThreadWriter[i].Name = i.ToString();
                AThreadWriter[i].IsBackground = true;
                AThreadWriter[i].Start();
            }
            ThreadReaderCreator = new Thread(fThreadCreator);
            ThreadReaderCreator.IsBackground = true;
            ThreadReaderCreator.Start();
        }

        void fThreadCreator()
        {
            Random r = new Random();
            AThreadReader = new Thread[Int16.Parse(txtBNMReaders.Text)];
            for (int i = 0; i < Int16.Parse(txtBNMReaders.Text); i++)
            {
                int IloopLength = Int16.Parse(txtBLowerBCReaders.Text) + r.Next(Int16.Parse(txtBUpperBCReaders.Text) - Int16.Parse(txtBLowerBCReaders.Text));
                for (int j = 0; j < IloopLength; j++) ;                
                AThreadReader[i] = new Thread(fThreadReader);
                AThreadReader[i].Name = i.ToString();
                AThreadReader[i].IsBackground = true;
                AThreadReader[i].Start();
            }
        }

        void fThreadWriter()
        {

            Random r = new Random();
            int ID = Int16.Parse(Thread.CurrentThread.Name);
            int news = ID;
            while (bWriterMustAlive)
            {
                int IloopLength = Int16.Parse(txtBLowerBCWriters.Text) + r.Next(Int16.Parse(txtBUpperBCWriters.Text) - Int16.Parse(txtBLowerBCReaders.Text));
                for (int i = 0; i < IloopLength; i++) ;
                
                sDataBase = "";
                for (int i = 0; i < Int16.Parse(txtBNumbersInString.Text); i++)
                {
                    while (true)
                    {
                    rw.EnterWriteLock();
                    sDataBase += news.ToString() + " ";
                    rw.ExitWriteLock();
                    }
                }
                
                news += Int16.Parse(txtBNMWriters.Text);
            }
        }
        void fThreadReader()
        {

            int ID = Int16.Parse(Thread.CurrentThread.Name);
            changeAmountOfProgressBar(ID+1);
            
            for (int i = 0; i < sDataBase.Length; i++)
            {

                  asReaderDataBase[ID] += sDataBase[i];

            }

            if (ID == Int16.Parse(txtBNMReaders.Text) - 1)
            {
                bWriterMustAlive = false;

            }

        }