货币的值如何按各个不同国家的习惯来输出

System.Globalization.CultureInfo MyCulture = new System.Globalization.CultureInfo("en-US");
    //System.Globalization.CultureInfo MyCulture = new System.Globalization.CultureInfo("en-GB");
    decimal y = 9999.8m;
  string str = String.Format(MyCulture, "My amount = {0:c}", y);
  ViewBag.ss = str;