using System;
using System.Text;

  public static string UnBase64String(string value)
  {
    if (value == null || value == "")
    {
      return "";
    }
    byte[] bytes = Convert.FromBase64String(value);
    return Encoding.UTF8.GetString(bytes);
  }

  public static string ToBase64String(string value)
  {
    if (value == null || value == "")
    {
      return "";
    }
    byte[] bytes = Encoding.UTF8.GetBytes(value);
    return Convert.ToBase64String(bytes);
  }

 public static void Base64Test(){
 string base64string = GameCommon.ToBase64String("aaaa11233Base64編碼和解碼");
 string unbase64string = GameCommon.UnBase64String(base64string);
 Debug.Log("base64string : " + base64string);
 Debug.Log("unbase64string : " + unbase64string);
 }