System.Configuration.XmlUtilWriter.AppendCharEntity C# (CSharp) Method

        internal int AppendCharEntity(char ch) {
            string numberToWrite = ((int)ch).ToString("X", CultureInfo.InvariantCulture);
            Write('&');
            Write('#');
            Write('x');
            Write(numberToWrite);
            Write(';');
            return numberToWrite.Length + 4;
        }