c# - Convert a String, which is already malformed -

i have class, uses class reads textfile. textfile written in ascii or clear cp1525.

background info: the textfile generated in axapta , uses asciiio class writes text using writeraw method

the class using collegue , using c# streamreader read files. works okay because files written in utf8, in particular case isn't.

so streamreader reads file utf8 , passes read string me. have letters, example lating small letter o diaeresis (ö) aren't formated need them be.

a simple convert of string doesn't in case , can't figure out how can right letters.

so how reads it:

char quotationchar = '"'; string line = ""; using (streamreader reader = new streamreader(filename)) {     if((line = reader.readline()) != null)     {         line = line.replace(quotationchar.tostring(), "");     } } return line; 

what happens is, in textfile have german word "röhre" which, after reading streamreader, transforms r�hre (which looks stupid in database).

i try convert every letter

encoding enc = encoding.getencoding(1252);  byte[] utf8_bytes = new byte[line.length]; (int = 0; < line.length; ++i) {     utf8_bytes[i] = (byte)line[i]; } string propencodestring = enc.getstring(utf8_bytes, 0, utf8_bytes.length); 

that doesn't give me right character !

byte[] myarr = encoding.utf8.getbytes(line); string propencodestring = enc.getstring(myarr); 

that returns wrong character.

i aware solve problem using this:

using (streamreader reader = new streamreader(filename, encoding.default, true)) 

but fun: how can right string wrongly decoded string ?

once utf8 ascii conversion first made, characters don't map valid ascii entries replaced same bad data character means data lost , can't 'convert' character downstream. see example: https://dotnetfiddle.net/xwysml