protected void Decode_Click(object sender, EventArgs e)
    {
        huffmantree.tree(file);
        huffmantree.Encoding(file);
        // Console.WriteLine("");
        //Console.WriteLine("You have 3 attempts to decode");
        int tries = 1;

        while (tries <= 3)
        {
            //Console.Write("Enter key to decode ");
            string key = Key.Text;
            if (key == "123")
            {
                // Console.Write("You entered a valid key.");
                string DecodedData = huffmantree.Decoding();
                data.InnerText = DecodedData;
                break;
            }
            else
            {
                // Console.WriteLine("You entered an Invalid key!!!");
                tries++;
            }
        }
    }