c# - Currency Format Returns Invalid Characters in Azure -

i have double amount 5190.40, when convert "swiss franc" gives 5'190.40. however, when deploy changes azure, not convert correctly. converted currency 5Â 190.40, incorrect. culture name german (switzerland).

i using following code convert currency

internal static string formatcurrency(this double amount, string currencycode) {         var culture = (from c in cultureinfo.getcultures(culturetypes.specificcultures)                        let r = new regioninfo(c.lcid)                        r != null                        && r.isocurrencysymbol.toupper() == currencycode.toupper()                        select c).firstordefault();          if (culture == null)             return amount.tostring("0.00");          culture.numberformat.currencysymbol = string.empty;         return string.format(culture, "{0:c}", amount).trim(); } 

i executing code in following manner:

double amount = 5190.40; amount.formatcurrency("chf");