c# - C＃でスマートクォート（およびその他のばかげた文字）を読み書きするにはどうすればよいですか？

Answer 1

Answer 2

Chances are the text will be UTF8.

File.ReadAllText(filePath, Encoding.UTF8)

coupled with

File.WriteAllText(destinationFile, sb.ToString(), Encoding.UTF8)

should cover off dealing with the Unicode characters. If you do one or the other you're going to get garbage output, both or nothing.