Question

I wanto to convert the string like “123” to string like “\u0031\u0032\u0033”.
How can i do this in .NET?
For example: reverse convert:

Encoding enc = Encoding.GetEncoding("us-ascii",
                                          new EncoderExceptionFallback(),
                                          new DecoderExceptionFallback());
            byte[] by = enc.GetBytes(s);
            string ans = enc.GetString(by);
            return ans;

Answer 1

Strings in .NET already are Unicode, so there’s no need to convert them from Unicode to Unicode.

If you want to output a unicode escaped string, then try this:

string ans = string.Concat(s.Select(c => string.Format("\\u{0:x4}", (int)c)).ToArray());

Result:

\u0031\u0032\u0033

See it working online: ideone

In .NET 4.0 you can omit the call to ToArray.