// print button which gets the string of the block
        // and places it on the screen

        private void printBlock_Click(object sender, EventArgs e)
        {
            int index = 0;

            if (Int32.TryParse(printOutput.Text, out index))
            {
                // getting the info to print from the mini text box to the
                // actual screen.
                richTextBox1.Text = blockchain.blockToString(index);
            }
        }