System.Xml.XmlBinaryReaderSession.TryLookup C# (CSharp) Method

        public bool TryLookup(string value, out XmlDictionaryString result)
        {
            if (value == null)
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull(nameof(value));

            if (_strings != null)
            {
                for (int i = 0; i < _strings.Length; i++)
                {
                    XmlDictionaryString s = _strings[i];
                    if (s != null && s.Value == value)
                    {
                        result = s;
                        return true;
                    }
                }
            }

            if (_stringDict != null)
            {
                foreach (XmlDictionaryString s in _stringDict.Values)
                {
                    if (s.Value == value)
                    {
                        result = s;
                        return true;
                    }
                }
            }

            result = null;
            return false;
        }

        public string GetValue(IXmlDictionary staticDictionary, XmlBinaryReaderSession readerSession)
        {
            int id = this.DictionaryId / 2;
            XmlDictionaryString dicString = XmlDictionaryString.Empty;
            bool found;
            if (this.IsSession)
            {
                if (readerSession == null)
                {
                    return null;
                }

                found = readerSession.TryLookup(id, out dicString);
            }
            else
            {
                if (staticDictionary == null)
                {
                    return null;
                }

                found = staticDictionary.TryLookup(id, out dicString);
            }

            if (found)
            {
                return dicString.Value;
            }
            else
            {
                throw new ArgumentException("Cannot find value for dictionary string with ID = " + this.DictionaryId);
            }
        }