SIPSorcery.SIP.SIPReplacesParameter.Parse C# (CSharp) Method

        public static SIPReplacesParameter Parse(string replaces)
        {
            var callIDMatch = Regex.Match(replaces, "^(?<callid>.*?);");
            if (replaces.IndexOf(';') != -1)
            {
                var toTagMatch = Regex.Match(replaces, "to-tag=(?<totag>.*?)(;|$)", RegexOptions.IgnoreCase);
                var fromTagMatch = Regex.Match(replaces, "from-tag=(?<fromtag>.*?)(;|$)", RegexOptions.IgnoreCase);

                if (toTagMatch.Success && fromTagMatch.Success)
                {
                    SIPReplacesParameter replacesParam = new SIPReplacesParameter();
                    replacesParam.CallID = replaces.Substring(0, replaces.IndexOf(';'));
                    replacesParam.ToTag = toTagMatch.Result("${totag}");
                    replacesParam.FromTag = fromTagMatch.Result("${fromtag}");

                    return replacesParam;
                }
            }

            return null;
        }