CODING FORM
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace PasswordProgram
{
public partial class frmPassword : Form
{
public frmPassword()
{
InitializeComponent();
}

private void btnConvertHex_Click(object sender, EventArgs e)
{
Hex_Converter.HexConverter Encription = new Hex_Converter.HexConverter();
string sData = txtpasswordEncription.Text;
rchEncriptData.Text = Encription.PasswordEncription(ref sData);

}

private void btnDecription_Click(object sender, EventArgs e)
{
Hex_Converter.HexConverter Encription = new Hex_Converter.HexConverter();
string sData = rchEncriptData.Text;
txtpasswordEncription.Text = Encription.PasswordDecription(ref sData);
}

private void label1_Click(object sender, EventArgs e)
{

}

//private void button1_Click(object sender, EventArgs e)
//{
// txtpasswordEncription.Enabled = true;
// txtpasswordEncription.Enabled = false;
// rchEncriptData.Enabled = false;
// rchEncriptData.Enabled = false;
//}
}
}

CODE In New Class
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.VisualBasic; // I'm using this class for Hex Converion
namespace Hex_Converter
{
public class HexConverter
{
public string PasswordDecription(ref string Data)
{
string Data1 = "";
string sData = "";

while (Data.Length > 0)
{
Data1 = System.Convert.ToChar(System.Convert.ToUInt32(Data.Substring(0, 2), 16)).ToString();
sData = sData + Data1;
Data = Data.Substring(2, Data.Length - 2);
}
return sData;
}
public string PasswordEncription(ref string Data)
{
string sValue;
string sHex = "";
while (Data.Length > 0)
{
sValue = Conversion.Hex(Strings.Asc(Data.Substring(0, 1).ToString()));
Data = Data.Substring(1, Data.Length - 1);
sHex = sHex + sValue;
}
return sHex;
}
}
}