Replace unicode escape sequences in a string [duplicate]

Answer 1

You could regular expression to parse the file:

private static Regex _regex = new Regex(@"\\u(?[a-zA-Z0-9]{4})", RegexOptions.Compiled);
public string Decoder(string value)
{
    return _regex.Replace(
        value,
        m => ((char)int.Parse(m.Groups["Value"].Value, NumberStyles.HexNumber)).ToString()
    );
}

and then:

string data = Decoder(File.ReadAllText("test.txt"));