CSharp Read Resource File as Json

protected void Page_Load(object sender, EventArgs e)

        {
          mapResFileName = "MapResources.en-US.resx";

            if (m_UserLanguage == "ar")

            {

                mapResFileName = "MapResources.resx";

            }

            ClientScript.RegisterStartupScript(this.GetType(), "localizedString", getReourseFileAsJSON(mapResFileName), true);

        }

        public string getReourseFileAsJSON(String resourceFileName)

        {           

            try

            {

                string mapResString = "localizedString={'userLang':'" + m_UserLanguage + "',";

                ResXResourceReader rsxr = new ResXResourceReader(

                String.Format("{0}{1}\\{2}", System.AppDomain.CurrentDomain.BaseDirectory.ToString(), "App_GlobalResources", resourceFileName));

                foreach (DictionaryEntry d in rsxr)

                {

                    mapResString += "'" + d.Key.ToString() + "':'" + d.Value.ToString() + "',";

                }

                mapResString += "};";

                return mapResString;

            }

            catch (Exception exc)

            {

                return "File Not Found";

            }

            

        }