Encription of user sensitive data

using System;
using System.Collections.Generic;
using System.Text;

/// <summary>
/// Summary description for Base64
/// </summary>
public sealed class Base64
{

public static string Encode(string data)
{
try
{
byte[] encData_byte = new byte[data.Length];
encData_byte = Encoding.UTF8.GetBytes(data);
string encodedData = Convert.ToBase64String(encData_byte);
return encodedData;
}
catch(Exception e)
{
throw new Exception(“Error in base64Encode ” + e.Message);
}
}

public static string Decode(string data)
{
try
{
UTF8Encoding encoder = new UTF8Encoding();
Decoder utf8Decode = encoder.GetDecoder();

byte[] todecode_byte = Convert.FromBase64String(data);
int charCount = utf8Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
char[] decoded_char = new char[charCount];
utf8Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0);
string result = new String(decoded_char);
return result;
}
catch(Exception e)
{
throw new Exception(“Error in base64Decode ” + e.Message);
}
}
}