Ecrypt

using System;
using System.Web.UI.WebControls;
using System.Security.Cryptography;
using System.Text;

namespace JSVirtualKeyboard
{
  public partial class WebForm2 : System.Web.UI.Page
   {

    private string Encrypt(string txttoEncrypt)
    {
        string EcriptedData = string.Empty;
        byte[] txt_encode = new byte[txttoEncrypt.Length];
        txt_encode = Encoding.UTF8.GetBytes(txttoEncrypt);
        EcriptedData = Convert.ToBase64String(txt_encode);
        return EcriptedData;
    }

    private string Decrypt(string txttoDecrypt)
    {
        UTF8Encoding encode_pwd = new UTF8Encoding();
        string DecryptedData = string.Empty;
        Decoder Decode = encode_pwd.GetDecoder();
        byte[] todecodeByte = Convert.FromBase64String(txttoDecrypt);
        int charCount = Decode.GetCharCount(
                                            todecodeByte,
                                            0,
                                            todecodeByte.Length
                                            );
        char[] decoded_char = new char[charCount];
        Decode.GetChars(todecodeByte, 0, todecodeByte.Length, decoded_char, 0);
        DecryptedData = new String(decoded_char);
        return DecryptedData;
    }

    protected void btnencrypt_Click(object sender, EventArgs e)
    {
        TextBox2.Text = Encrypt(TextBox1.Text);
    }

    protected void btndecrypt_Click(object sender, EventArgs e)
    {
        TextBox1.Text = Decrypt(TextBox2.Text);
    }

  }
}