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I have a question, which Unicode encoding to use while encoding .NET string into base64? I know strings are UTF-16 encoded on Windows, so is my way of encoding is the right one?
public static String ToBase64String(this String source) {
return Convert.ToBase64String(Encoding.Unicode.GetBytes(source));
}
What you’ve provided is perfectly functional. It will produce a base64-encoded string of the bytes of your source string encoded in UTF-16.
If you’re asking if UTF-16 can represent any character in your string, then yes. The only difference between UTF-16 and UTF-32 is that UTF-16 is a variable-length encoding; it uses two-bytes to represent characters within a subset, and four-bytes for all other characters.
There are no unicode characters that cannot be represented by UTF-16.