System.Xml.Xsl.XsltOld.SequentialOutput.WriteHtmlUri C# (CSharp) Method

        private void WriteHtmlUri(string value) {
            Debug.Assert(value != null);
            Debug.Assert(this.isHtmlOutput);

            int length = value.Length;
            int i = 0;
            while(i < length) {
                char ch = value[i];
                i ++;
                switch (ch) {
                case '&':
                    if(i != length && value[i] == '{') { // &{ hasn't to be encoded in HTML output.
                        Write(ch);
                    }
                    else {
                        Write(s_EnAmpersand);
                    }
                    break;
                case '"':
                    Write(s_EnQuote);
                    break;
                case '\n':
                    Write(s_EnNewLine);
                    break;
                case '\r':
                    Write(s_EnReturn);
                    break;
                default:
                    if(127 < ch) {
                        if (this.utf8Encoding == null) {
                            this.utf8Encoding = Encoding.UTF8;
                            this.byteBuffer   = new byte[utf8Encoding.GetMaxByteCount(1)];
                        }
                        int bytes = this.utf8Encoding.GetBytes(value, i - 1, 1, this.byteBuffer, 0);
                        for(int j = 0; j < bytes; j ++) {
                            Write("%");
                            Write(((uint)this.byteBuffer[j]).ToString("X2", CultureInfo.InvariantCulture));
                        }
                    }
                    else {
                        Write(ch);
                    }
                    break;
                }
            }
        }