     private void button3_Click(object sender, EventArgs e)
        {

            ICollection keys = hashTable.Keys;
            textBox3.Clear();
            textBox3.Text = "Key \t Valuse";
            textBox3.Text += "\r\n==== \t =====";
            foreach (string key in keys)
                textBox3.Text += "\r\n" + key + "\t" + hashTable[key];
		
        }
