System.Net.Http.Headers.WarningHeaderValue.ToString C# (CSharp) Method

        public override string ToString()
        {
            StringBuilder sb = new StringBuilder();

            // Warning codes are always 3 digits according to RFC2616
            sb.Append(_code.ToString("000", NumberFormatInfo.InvariantInfo));

            sb.Append(' ');
            sb.Append(_agent);
            sb.Append(' ');
            sb.Append(_text);

            if (_date.HasValue)
            {
                sb.Append(" \"");
                sb.Append(HttpRuleParser.DateToString(_date.Value));
                sb.Append('\"');
            }

            return sb.ToString();
        }

        public void ToString_UseDifferentRanges_AllSerializedCorrectly()
        {
            WarningHeaderValue warning = new WarningHeaderValue(113, "host:80", "\"Heuristic expiration\"");
            Assert.Equal("113 host:80 \"Heuristic expiration\"", warning.ToString());

            warning = new WarningHeaderValue(199, "[::1]", "\"Miscellaneous warning\"",
                new DateTimeOffset(2010, 7, 19, 18, 31, 27, TimeSpan.Zero));
            Assert.Equal("199 [::1] \"Miscellaneous warning\" \"Mon, 19 Jul 2010 18:31:27 GMT\"", warning.ToString());
        }